Category: Applications sobriety

What’s the carbon impact for social network applications?

Reading Time: 6 minutes

The stay-at-home context has mechanically increased the mobile applications use of the social network type in order to keep people connected. Like the professional use of videoconferencing tools, these uses have brought additional pressure on the network and on the servers of these solutions.

What are our activities impact on social networks? What are the most / least impactful solutions for the environment, network congestion and the autonomy of our smartphones?

For this study, we’ve chosen to measure the news feed of the 10 most popular social media applications: Facebook, Instagram, LinkedIn, Pinterest, Reddit, Snapchat, TikTok, Twitch, Twitter and Youtube. Although these applications are different in terms of functionality, we have chosen to compare them in terms of carbon impact, energy consumption and data exchanged.

For each of its applications, measured on an S7 smartphone (Android 8), the user scenario lasting 1 minute was carried out through our GREENSPECTOR Test Runner, allowing manual tests to be carried out. For each of its applications, the user scenario corresponds to a scrolling of the contents of the news feed of an active account.

Each data measurement is the average of 3 homogeneous measurements (with a small standard deviation). The consumption measured on the given smartphone according to a wifi type network can be different on a laptop PC with a wired network for example.

To make Carbon projections to assess the impacts of infrastructure (data center, network), we relied on the OneByte methodology based on real data measured by the volume of data exchanged. This evaluation methodology takes into account the consumption of resources and energy in use for the equipment requested. As it is a very macroscopic approach, it is subject to uncertainty and could be refined to adapt a context, a given tool. For the Carbon projection, we have assumed a projection of 50% via a wifi network and 50% via a mobile network.

To make the carbon projection of the mobile, we measure both the energy consumption linked to the use case based on real measurement on real device and to integrate the share of material impact, we rely on the rated theoretical wear and tear generated by the use case on the battery, the first wearing part of a smartphone. 500 cycles of full charges and discharges therefore cause in our model a change of smartphone.

Projected data measured in Carbon impact (gEqCO2)

Youtube (0.66 gEqCO2) is first in the ranking, followed closely by Facebook (0.73 gEqCO2) and LinkedIn (0.75 gEqCO2). This is easily explained, since the only videos launching during the news feed for Youtube are thumbnails and this, after 2 seconds. It should be noted that in our test, the scanning of the news feed was slow enough to launch videos according to this principle of tempo.

On the Environmental Impact side of applications, the social network whose news feed is the most impacting is Tik Tok. Unsurprisingly, this social network is based exclusively on watching videos and preloading videos from the news feed at startup. The Shift Project also presents streaming platforms such as Netflix, Youtube and Tik Tok as being responsible for 80% of digital electricity consumption. We had already noted this significant impact, in particular when the application was launched in 2019.

Only 4 applications (Tik Tok, Reddit, Pinterest and Snapchat) are above the average carbon impact (2.1 qEqCO2) observed for this comparison of the news feed. Moreover, the Tik Tok news feed has a carbon impact of 7.4 times greater than that of Youtube.

What if we were to project all of this at the user level?

If we projected this usage “display and progress of the news feed” as being representative over the duration of daily usage/user, we will obtain this data.

According to the Global Web Index 2019, we spend on average 2 hours and 22 minutes on social networks. If we project the average carbon impact of the 10 applications measured (2.10 gEqCO2) over 60 seconds at the average time spent per user, we obtain for a user/day: 280.5 gEqCO2. Or the equivalent of 2.50 km traveled in a vehicle. This also corresponds to 102 kgEqCO2 per user per year, the equivalent of 914 km traveled by medium vehicle in France. This is equivalent to 1.5% of the carbon impact of a French person (7 Tons).

And globally?

If we projected this usage “display and progress of the news feed” as being representative over the duration of daily usage/user, we will obtain this data.

The 2019 figures of LyfeMarketing and Emarsys announce 3.2 billion social network users (42% of the world population) of which 91% access social networks via a mobile device. 80% of the time spent (2 hours and 22 minutes) on social networks is spent on a mobile device. If we project our carbon/user impact to these data, we obtain: 262 million Tons EqCO2 per year for the 3.2 billion users on mobile, the equivalent of 56% of EqCO2 impacts in France.

Energy consumption measurement (mAh)

In terms of energy consumption, the bad students are the news feeds of the Snapchat, Tik Tok and Pinterest applications. The good energy students are Youtube, LinkedIn, and Reddit. The Snapchat news feed consumes 1.6 times more energy here than that of Youtube.

The average established for energy consumption is 10.6 mAh, only 4 applications are above.

If we assume that the application runs continuously on the smartphone, then we can project the remaining battery life time (graph below). We can observe that with Snapchat running, the battery lasts 3.45 hours. On the Youtube side, the battery autonomy lasts 5.46 hours, i.e a ratio of 1.5 (or a difference of 2 hours) between the best and the least good application of this ranking. The average is 4.8 hours for all of these applications. The reference measurement of the test smartphone is 1.32 mAh, its battery capacity of 3000 mAh, we can estimate its autonomy at 18 hours. The use of social networking applications therefore greatly impacts your battery life.

Measurement of data exchanged (MB)

In terms of data exchanged, the bad students are the news feeds of the Tik Tok, Reddit and Pinterest applications. The good students on the data exchanged side are Youtube, Facebook and LinkedIn. Tik Tok consumes 9 times more data than the Youtube application.

The average established for the data exchanged is 19.2 MB for this use. Beware of your data plans! Projection in 1 month, you will have consumed 74 GB!

Taking into account the real average time spent by social network according to the Visionary Marketing blog: if you only use Tik Tok in social network (up to 52 minutes per projected day), you will consume nearly 71 GB per month, while Instagram (up to 53 minutes a day) will consume 25.6 GB! Are you more connected to Facebook? This will make you consume almost 10 GB (up to 58 minutes per day) per month.

For those who like numbers

ApplicationVersionDownloadsGoogle Play Store GradeEnergy consumption (mAh)Data exchanged (MB)Memory consumption (MB)Carbon Impact (qEqCO2)
Facebook270.1/0.66.1275 000 000 000+4,29,551845870.73
Instagram142.0.34.1101 000 000 000+4,510,917,2503,21.91
LinkedIn4.1.451 500 000 000+4,39,26,15492,40.75
Pinterest8.17.0100 000 000+4,611,133,2432,73.53
Reddit2020.18.010 000 000+4,69,243,4414,04.54
Snapchat10.82.5.0 1 000 000 000+4,314,418505,82.03
Tik Tok16.0.43 1 000 000 000+4,312,146,9385,54.93
Twitch9.1.1100 000 000+4,69,69,4374,41.09
Twitter8.45.0 500 000 000+4,510,76,6421,10.83
Youtube15.19.34 5 000 000 000+4,19,15,1379,30.66

Which video conferencing mobile application to reduce your impact?

Reading Time: 5 minutes

Article updated with new measures on StarLeaf, Rainbow and Circuit by Unify on May 19, 2020.
Article updated with new measures on Hangouts and Google Meet on May 4, 2020.
Article updated with new measures on Tixeo and Infomaniak Meet on April 23, 2020.
Article updated with new measures on JITSI and Teams on April 15, 2020.

The current “stay at home” context mechanically increases the use of online collaboration tools, in particular videoconferencing tools. This leads to a pressure on the network and more particularly to a significant load on the servers of each solution. It is therefore important from an efficiency point of view but also an environmental impact one to choose the simplest and most efficient solution.

For this study, we compare 14 videoconferencing applications: Whereby, Webex (by CISCO), Skype, Zoom, JITSI, Microsoft Teams, Tixeo, Infomaniak Meet, Hangouts, GoToMeeting, Google Meet, StarLeaf, Rainbow and Circuit by Unify.

For each of these applications, measured on an Samsung S7 smartphone (Android 8), the following three scenarios were carried out through our GREENSPECTOR Test Runner, allowing manual tests to be carried out over a period of 1 minute:

  • Audio conference only in one-to-one
  • One-to-one audio and video conference (camera activated on each side)
  • One-to-one audio conference and screen sharing

Each measurement is the average of 3 homogeneous measurements (with a small standard deviation). The consumption measured on the given smartphone according to a Wi-Fi type network can be different on a laptop PC with a wired network for example.

Measurement of energy consumption (mAh)

The StarLeaf application consumes the most of all three scenarios. This is due to the fact that the consumption in audio only mode, audio + screen sharing or audio + video is the same. This is a special case of our study. The GoToMeeting application is the least energy-consuming, closely followed by Hangouts, Zoom and Webex.

The energy consumption of all these applications is on average 2.1 times higher when adding video to audio and only slightly higher when adding screen sharing to audio (+14%). It’s not a surprise, avoid sharing with a camera to consume less energy on your devices during your video conferences and save your autonomy and the lifespan of your battery!

Measurement of data exchanged (MB)

GoToMeeting and Webex are the two applications that consume the least data. JITSI and Infomaniak Meet are the ones that consumes the most. Overall and without any surprise we note that the audio scenario is the one that consumes the least data. While the scenario activating both audio + video stream is the most consuming one.

The data consumption of all of these applications is 13 times higher when adding video to audio and almost doubled when adding screen sharing to audio (+77%). It’s not a surprise, avoid sharing video and limit your screen sharing to consume less data on networks in your video conferences!

It should be noted that these significant differences are mainly due to the significant audio-video consumption of the JITSI application with 35 MB transferred in 1 minute compared to 1.13 MB for GoToMeeting! JITSI‘s optimized mode does not reduce this data impact (33.4 MB / minute). Infomaniak Meet based on the JITSI engine meets the same volume anomaly on average and mainly on the audio + video part without improvement with the optimized mode.

Projection of the measured carbon impact data (gEqCO2)

A conference on mobile is 3 times more impactful for the environment when we add video to audio.

The carbon impact projection of all of these applications is on average 3 times greater when adding video to audio and higher when adding screen sharing to audio (+35%). It’s no surprise, avoid sharing video and limit your screen sharing to less impact infrastructure (network, datacenter) and on your devices in the context of video conferences!

Without any surprise, a large part of the carbon impacts are located on the network part (63%) but the impacts part on the device (28%) should not be overlooked!

The JITSI and Infomaniak Meet apps even averages 5.8 times more impact when adding video to audio and 40% more when adding screen sharing.

In the Skype vs Teams battle at Microsoft, the overall results are very close (6%). The Carbon impact is lower for Skype with a lower data impact but higher energy consumption on the mobile than Teams.

Which applications optimize energy and data consumption?

Only Whereby and Webex could be tested on optimization features for the mobile version.

The Whereby application with its “Mobile mode” setting which limits the resolution of the stream as well as other resource consumption optimizations. And Webex thanks to its configuration allowing to deactivate High-definition playback of videos only. Whereby saves 21% on energy consumption on the audio side, 15% on the audio and video side and 3% on the screen sharing side. These gains are nevertheless low considering the results obtained by the application that consumes the most audio and video mode from our panel.

On the Webex side, the gains are barely visible as limited only to the video part. It’s barely 5% gain in the Audio and Video scenario for the energy and carbon impact. The exchanged data is even slightly higher in audio and video mode.

The optimized JITSI application does not improve the data or energy impact. Power consumption is even higher in screen sharing mode in this optimized mode. However, there is a reduction in the data loaded in this optimized but minor mode (11% on average). Same findings for Infomaniak Meet.

The optimization of the TIXEO parameters makes it possible to considerably reduce the impact in audio + video mode and allows it to be classified as the 2nd least impacting application in the panel.

As for the Zoom application, a notification of battery overconsumption appeared several times during the measurements. Although we can optimize the video quality on PC, it does not seem possible to configure this on mobile. Without this optimization, the application becomes the most energy-consuming application in audio + video mode.


  • Promote audio only during your conferences: the video stream will tend to consume much more especially when sharing video via camera.
  • We recommend that publishers provide optimization options to the user and make them as accessible as possible even by default.
  • Prefer videoconferences over travel by car!
  • Comparison for 2 people who talk to each other for 3 hours in video + video (1 gEqCO2 on average per minute) when one of the two made 20 kms (112 g eqCO2 / km in France) round trip for a face-to-face face,
  • In videoconference: 180 * 1 * 2 = 360 gEqCO2.
  • By car: 112 * 20 = 2.4 kg EqCO2. Or 6.7 times more for the physical one-to-one.

Best 2019 Android apps and games ranking by GREENSPECTOR

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Google unveiled the best of 2019 Google Playstore in early December last year. Thanks to the GREENSPECTOR App Mark technology, we are revealing the ranking of these applications according to the App Mark, which assesses applications according to 5 criteria: performance, sobriety, discretion, inclusion and, of course, ecology.

Favorite 2019 applications ranking

At the top of this ranking we find the following three applications: Boosted, 21 Buttons and Omio. Only 1/3 of the applications are below the global ecoscore average. Among the 3 least sober applications of this ranking, 2 are strongly impacted by a zero score on at least one of the key indicators. In fact, the Plant Nanny application presents a score of zero on the ecological side (32 MB of data loaded during our evaluation), for the Curio application, it is the performance indicator which is zero, impacted by the time of application loading more than 23 seconds.

Focus on Boosted vs Music Zen

Here we compare the application with the best GREENSPECTOR App Mark (Bosted) versus the lowest ranked application in this ranking (Music Zen).

Even if the energy consumption is not the strong point of Boosted, MusicZen consumes 2 times more battery than Boosted on an identical route … what not to be “Zen” For its autonomy! Simple explanations: there are many trackers in this application which alters its performance and its sobriety. As a reminder, an added tracker also means an average of 8.5% more resource consumption.

Favorite 2019 games apps ranking

On the podium of the highest ranked game applications, we find: Assassin’s Creed Rebellion, Brawl Stars and Fishing Life. We observe that the last three game applications have a zero score for the ecology indicator. This is explained by two highly high technical criteria: the volume of data loaded as well as the CO2 impact. By the way, gaming applications are also more impactful on average than other applications.

Focus on Assassin’s Creed Rebellion vs Diner Dash Adventures

This time we are comparing the Assassin’s Creed Rebellion application versus Diner Dash Adventures.

To understand everything about these indicators, we invite you to read the following article 5 success keys for your application!

What are the best web browsers to use in 2020?

Reading Time: 8 minutes

The 2021 edition of this ranking is available! Read the study

The web browser is a main tool on a mobile device. Not only for websites but also for new applications based on web technologies (progressive web app, games, …).

In our 30 most popular mobile apps ranking, among the mails, direct messaging, social networks, browsers categories, web browsing and social networks are on average more consuming than games or multimedia applications. The ratio would be 1 to 4 between the least and most energy consuming applications.

Decreasing the environmental impact of the digital life and increasing the autonomy of phones go in part through the choice of a good browser. Just as if you want to reduce the impact of your mode of transport, it is important to take the most efficient vehicle.

Last year we published the 2018 ranking of the least energy-consuming browsers, we made a new edition for 2020, more complete, made with our GREENSPECTOR App Mark.

Overall Ranking

The average rating is 36/100 which is pretty mediocre. It can be explained by low notes for each of the metrics.
The three least energy-consuming browsers are: Vivaldi, Firefox Preview, Duck Duck Go.

Overall energy consumption (in mAh)

The median is 47 mAh and a large part of the browsers are in this consumption level (8/18 are in the 2nd quartile).
Note that the last 3 browsers in the ranking are recognized by a consumption 75% higher than the median. Firefox, Qwant and Opera Mini are indeed very energy intensive.

Energy consumption of navigation (in mAh)

The last 3 browsers of the global ranking (Opera Mini, Firefox and Qwant) as well as Mint consume much more than the average (between 20 and 35 mAh against 16 mAh).

It is sufficient to say that for most browsers (apart from the previous exceptions), pure navigation is not going to be the reason for the difference in overall consumption. This is mainly due to the use of visualization engines. Most browsers use the Chromium engine. For Opera Mini, the specificity is that a proxy is used and can compress the size of the sites. It seems that this proxy is not good for the energy, in fact the decompression on the user’s phone consumes a lot of energy.

For the Firefox app, over-consumption of energy is a known and shared thing, this is one of the reasons why Mozilla is under development of a new browser. Internal code name is Fenix ​​and public one is Preview. The measures in this ranking are rather encouraging on consumption (in the average).
For Qwant, this is due to the use of the Firefox engine! The measurements between Qwant and Firefox are indeed very close.

Power consumption of features (in mAh)

The main feature that is browsing the web also requires other important features: new tab opening, enter an address in the taskbar … Indeed, when we open a new tab, each browser offers different features: mainly used websites, latest news, …

On pure navigation, browsers differ little, there are significant differences in energy consumption on other features with a ratio of more than 3 (between 4 mAh and 12 mAh).

Note that the first 3 (Firefox Focus, Firefox Preview and Duck Duck Go) have a simple homepage. The consumption of the browser in Idle (inactivity) is then very low. Functional sobriety pays the consequences!

When launching browsers, the energy consumptions are quite similar to each other. Note, however, that opening a tab and writing a URL are actions that are performed several times. If we take a daily projection of 30 new tabs and 10 URL entries, we can still see the difference between browsers and the large advance of Firefox Preview and Focus!

The basic features are not insignificant in the overall consumption.

Projection of autonomy (in number of hours)

If we take this energy data and project it for a navigation of several websites, we identify the maximum time that the user can navigate to the complete discharge of his battery:

Data consumption (in MB)

The difference in data consumption between browsers (8 MB difference) is explained by the pure navigation and the different features.

On the navigation, we explain this difference:

  • some applications do not manage the cache at all for reasons of data protection and confidentiality (Firefox Focus)
  • proxy usage that optimizes data (Opera Mini)
  • a difference in the implementation of cache management. It is possible that some browsers invalidate the cache and that data is loaded while they are cached.
  • additional data consumption continues in the background (idle tabs, background data not blocked …)
  • download performance differences that increase the duration of the measurement. Indeed, if a browser is powerful, the counterpart is that many more data are potentially loaded in the background.

The difference in overall consumption can also be explained by the data consumption of the basic functionalities:

Many browsers are very consuming. We note the 3 MB of Qwant that seem abnormal!
It can be considered that for browsers, this consumption should be close to 0. Indeed, the main feature of a browser is to display a website, any feature (and associated consumption) can be considered as “over-consumption”.
In this context, many browsers consume data when writing the URL. This is mainly explained by the URL proposal features. There is indeed exchange between the mobile and the servers, either directly by the browser or by the associated search engine.

For example, for the Yandex browser below, the details of data exchanges when writing a URL show more than 400 KB of data exchanged.

In contrast, below, trading for Brave is frugal with less than 2 KB.

Browser performance (in seconds)

The measures allow us to evaluate the performance of the key features:

  • Launching the browser
  • Adding a tab
  • Writing a URL
  • Removing the cache
  • Mozilla Kraken Bench

NB: This study does not evaluate the display performance of websites. However, the Mozilla Kraken benchmark allows this in part by evaluating the functionality of browsers.

Efficiency of browsers (in mAh/s)

We can evaluate the efficiency of browsers by taking the performance of the Mozilla Kraken benchmark and the associated energy. Efficiency is the energy consumption per unit of time:

Samsung, Opera Mini and Opera are the most efficient browsers. This ranking is different from that of overall energy consumption. For Samsung Internet, this first place in terms of efficiency on a Samsung hardware can be explained by the optimized link that can have the manufacturer with a pre-installed software. The Opera browser has a good positioning (2nd for overall consumption and 3rd for efficiency).

Track of improvements

It is possible to improve the consumption of navigation.

For the user :

  • Choosing an efficient browser
  • Use bookmarks or favorites to avoid going through the entry bar
  • Configure the energy saving options of browsers (mode or dark theme, data server …)

For developers of sites:

  • Eco-design their site
  • Test and measure on different browsers to identify different behaviors and take them into account

For browser editors:

  • Measure energy consumption and efficiency
  • Eco-design features
  • Reduce resource consumption of recurring features (url write, new tab …)
  • Make the homepage as simple as possible.

Measurement protocol

The measurements were carried out by the laboratory GREENSPECTOR App Mark on the basis of a protocol Standardized: Samsung S7 Smartphone, Android 8, Wi-Fi, 50% brightness. Between 4 and 8 iterations were carried out and the value used is the average of these measurements. Measurement campaigns follow a scenario that evaluates browsers in different situations.

Evaluation of features

  • Launching the browser
  • Adding a tab
  • Writing a URL in the search bar
  • Remove tabs and clean the cache


  • Launch of 6 sites and wait for 20 seconds to be representative of a user journey

Benchmark browser

Evaluation of browser inactivity periods

  • At launch (this allows to evaluate the homepage of the browser)
  • After navigation
  • After closing the browser (to identify closing problems)

For each iteration, the following tests are performed:

  • Deleting the cache and tabs (without measurement)
  • First measure
  • Second measure to measure the behavior with cache
  • Remove cache and tabs (with measure)
  • System shutdown of the browser (and not only a closure by the user to ensure a real closing of the browser)

The average measurement therefore takes into account a navigation with and without cache.

The main metrics analyzed are: display performance, power consumption, data exchange. Other metrics such as CPU consumption, memory consumption, system data … are measured but will not be displayed in this report. Contact GREENSPECTOR for more information.

In order to improve the stability of the measurements, the protocol is completely automated. We use an abstract GREENSPECTOR test description language that allows us to fully automate this protocol. Browser configurations are the default ones. We have not changed any settings of the browser or its search engine.


A notation out of 100 makes it possible to classify the browsers between them. It is based on the notation of 3 main metrics:

PerformanceDuration required for a test stepseconds (s)
EnergyBattery discharge rate found on the device during the test step, compared to the battery discharge rate of the device before the application is launchedMeasurements in uAh / s, then classification in multiples of the reference discharge velocity
DataTotal data volume (transmitted + received) during the test stepkilo-bytes (kB)

A weighting ratio is applied to the 5 step levels (from 5 for dark green to -1 for dark red) as described in the following example table:

The score of this application is then calculated at 61/100 for the energy metric.
Once the score of each of the three metrics obtained on 100 points, the total score of the application is calculated with equal weighting of the three metrics:
Total Score = (Performance Score + Energy Score + Score Data) / 3

Browsers evaluated

Browser nameVersion
Duck Duck Go5.32.3
Firefox Focus8.0.24
Firefox Preview2.3.0
Opera Mini44.1.2254.143

Some browsers were discarded because they did not allow the tests automation. For instance, UC Browser and Dolphin browsers could not be measured. Beyond automation, this is a symptom of a accessibility issue of the application. To improve the accessibility of applications for people with visual impairments (among others), it is necessary to set up buttons labels. The automation that we realized is based on this information. In the end, these browsers do not appear in the ranking, but we can consider that accessibility problems are in all cases a crippling problem.

Note : The 2020 ranking is hardly comparable to that of 2018. Indeed, our protocol having completely evolved, the tests are thus more advanced and automated.

Discover our lastest study: the 2019 Playstore Efficiency Report!

12 Rules to your application success

Reading Time: 4 minutes

In a previous article on this blog, we introduced you the 5 keys to success of a mobile application. We present today the 12 rules by business indicator to respect that will make the success of your application.


  • The application must be usable in degraded network conditions
  • The application should not require a recent OS version like Android to be used. Some users do not follow updates, either voluntarily or because of their platform that does not allow them. According to our “PlayStore Efficiency Report 2019“, only 70% of apps on the store are compatible with all versions of Android.
  • The application must comply with the accessibility rules and must not exclude users with disabilities.
  • The app should work well on older phones too only on recent and latest models. This criterion will be degraded if you do not respect that of sobriety. 1/4 of the Google PlayStore applications are 10% of the oldest mobiles. (Source: PlayStore Efficiency Report 2019)


  • The application must limit its energy consumption so as not to empty the user’s battery. Moreover, in case of excessive consumption, the system notifies the user of anapplication as a consumer. Some energy-intensive applications can reduce battery life to less than 3 hours. (Source: PlayStore Efficiency Report 2019)
  • The application must limit its resource consumption (number of CPUs, memory occupied, data exchanged) in order to avoid any slowness or pollution of the other applications (for instance because of the memory leak). 50% of Google PlayStore apps continue to process after the app closes. (Source: PlayStore Efficiency Report 2019)
  • The application must limit its network consumption in order to not involve any load on the data centers and thus avoid the additional costs related to the unnecessary congestion of the servers.


  • The first launch of the application must be fast: otherwise, it is possible that your users won’t go further, the inclusion criterion will not be respected either.
  • The loading times of the application must be acceptable in all network situations.


  • The application requires few or no permission. Do you really need to consult the list of contacts of your user? It’s all the more important to optimize this since the more permissions there are, the more the application consumes resources. This will therefore negatively influence the performance criterion.
  • The application has little or no tracker. The integration of a large amount of trackers implies a greater consumption of resources but can also cause bugs. This observation is even more true that the connection is degraded. On average, adding a tracker causes an over-consumption of resources of 8.5%.(Source : PlayStore Efficiency Report 2019)

According to our “PlayStore Efficiency Report 2019“, trackers, analytics and permissions are ubiquitous (44% applications have more than 5).


  • The application must respect the sobriety criterion, the CO2 impact linked to the use is lower as well as the pressure of the resources on the components of the equipment of the user (battery obsolescence, loss of performance). As a result, the user is less likely to renew their equipment, which reduces the risk of obsolescence of his material. Our latest study shows that mobile apps contribute at least 6% of CO2 emissions digital.

Some tracks for the improvement of its GREENSPECTOR App Mark score

Directly improve the application

Several metrics are evaluated by the GREENSPECTOR App Mark and can be directly improved.

  • Minimum SDK version: Allow Android older versions to avoid the exclusion of users using older generation platforms.
  • Number of trackers: the fewer trackers the application has, the more it will respect the user’s data as well as the protection of his privacy. In addition, trackers via processing and data exchange increase the consumption of the application.
  • APK size: the bigger the binary of the application, the more the network is solicited and the less efficient the application. In addition, a large application size will use the limited storage space of some users.
  • Loaded data: number of loaded data throughout the test run. Limiting this data will reduce the consumption of resources on both the smartphone and the network.
  • Data loaded in the background: when the application is not used, it must limit its impact and send or receive as less data as possible.

More global metrics

Some metrics are directly related to the impact of the application and its efficiency. It is possible to act on it via the previous metrics, see by other axes (functional optimization, improvement of the source code …)

  • CO2: the more the application consumes energy, the more the battery is solicited and become obsolete. This may lead to a premature renewal of the battery or even the smartphone and therefore to a higher environmental impact. Let’s not forget that most of the environmental impact of a smartphone is predominant in its manufacturing phase than in its use phase: keeping it longer reduces its overall impact.
  • Energy Overconsumption: if the application overconsumes, it increases the environmental impact but also creates discomfort for the user especially on the loss of autonomy and generates an additional stress factor.
  • Performance after the first installation: applications sometimes perform additional treatments during the first launch, so the launch time is sometimes increased. It is necessary to limit its treatments because this loss of performance can be inconvenient for the user.
  • Performance: the launch time of the application is an important data for the user. It is necessary to reduce it to the maximum while consuming the least possible resources.
  • 3G Performance: in poor network conditions, it is necessary to master the performance to maintain a good user experience. It is even possible that some users do not have access to the application in the case of degraded performance. Having a frugal service that takes into account the constraints of mobility is therefore a key to success.

What about now?

You are certainly wondering how your application is doing on these 5 indicators. Is it rather virtuous? Is there any risk? How is it ranked against its competitors? Do you have quick progress actions? If you ask us, we will tell you! Contact-us, and we will introduce you to your own inclusive, sober, fast, ecological and discreet evaluation – just like your application very soon.

Greenspector study of the energy consumption of Google Play Store mobile apps

Reading Time: 3 minutes

During the Mobile One event, GREENSPECTOR announces a survey of the major mobile consumer trends of the Google Play Store. More than 1000 applications were sifted through for Performance, Sobriety and Inclusion by the measurement tools developed by GREENSPECTOR.

Continue reading “Greenspector study of the energy consumption of Google Play Store mobile apps”

Energy consumption of the most popular e-commerce websites in France

Reading Time: 4 minutes

We measured the energy and resources consumption of the most popular e-commerce websites in France. Thanks to a recent study of SimilarWeb and ECN introducing a ranking of the Top 100 e-commerce websites, we selected the top 30 websites in this ranking and compared them according to their consumption of energy and mobile resources based on a simple functional path representative of their market activity.

Why measure energy consumption?

A website that consumes less energy will be more efficient because it will be “frugal”, with latency times shorter especially on a mobile phone that can sometimes be already crowded, older or low-tech. We can talk about a better “inclusion” business if the service responds in an acceptable way for users who do not always benefit from a favorable network conditions (degraded or saturated network) in their navigation.
The battery life will also be a curb for the user who does not wish to activate services too greedy for its autonomy, especially if it intends to use them very regularly. But surfing the web via mobile is it consumer on a smartphone? In our 2019 study of the Top 30 most popular mobile apps in the world, we had measured web browsing which is on average the most consuming category compared to video applications, video games or social networks. Tt’s enough to make buyers doubt and value their battery life.

In addition, a less energy-consuming website, and this is not the least argument, ultimately improves the website SEO

Indeed, the statistics of several tens of millions of visits in the month make it possible to imagine the extent of the impact throughout the chain of dissemination of the content and services of these websites. Even a slight improvement will benefit from a very important multiplier of reduction on the totality of the impact, whether on the user side or the server and network infrastructure. The digital actors must absolutely take into account this dimension of environmental responsibility in their business digital because as recalls the Shift Project, the digital climate impact will be equivalent in 2025 to that of light vehicles.

The 5 websites with the lowest energy consumption and the 5 most consuming ones

On the podium of the most energy-efficient websites, we find in first place the Rue Du Commerce website (10.6 mAh), LDLC (11.3 mAh) and ShowroomPrivé (12 mAh). Not far behind are the websites : Auchan (12.1 mAh) and Apple (12.4 mAh). The Rue Du Commerce website consumes 6.2% less than the second most energy-efficient one: LDLC and nearly 27% less than the average ranking (14.5 mAh).

On the side of the most energy-consuming websites, we find in last place the La Redoute website (18.1 mAh) followed by [Leroy Merlin] (https: // (17.6 mAh) and Airbnb (16.8 mAh). Finally, the websites Boulanger and Zalando (16.4 mAh) share the 26th and 27th place. The most energy-hungry website La Redoute consumes 24% more than the average of the ranking.


If we project the measured consumption on a Nexus 6 (voltage 3, 7 Volt), therefore only on the smartphone of the user, according to the average time of visit on a month: the flop 3 of the navigations the more consumers over the month are the sites: Leboncoin (99.34 MWh / month), Amazon (56.36 MWh / month), Ebay (19.34 MWh / month) . These 3 sites are at the same time penalized by a large number of visits, a rather long average visit time and a strong consumption of the purchase route.

The top 3 is made up of RueDuCommerce, LDLC and Auchan which are much less frequented but which also have the advantage of being in the best students on the market. consumption of the purchase route. If a site like Leboncoin was at the consumption level of the RueDuCommerce website, they could save their smartphone users more than 30 GWh/month, the equivalent of a country’s electricity consumption. like Haiti.

The projection of this Top 30 e-commerce websites, if all users had a Nexus 6 smartphone according to statistics visits indicated, would be about 3.7 TWh per year, the equivalent of the annual consumption of a country like Somalia. The server and network impacts were not taken into account in this study. It would be interesting to be able to estimate server side with the editors.

Energy consumption of 30 e-commerce websites

Only 12 websites are below the average (14.5 mAh) of this ranking. There is a 1.7 ratio between the least energy-consuming site (Rue Du Commerce) and the most energy-intensive (La Redoute).


The measurements were carried out by our laboratory on the basis of a standardized protocol: Nexus 6 Smartphone, Android 6, Wi-Fi, low brightness. 3 campaigns were conducted and the value used is the average of these 3 measurements. The measurement campaigns respect a specific user scenario adapted to each website (launch of Google Chrome, access to the URL of the website, search scenario, selection, basket and display basket)

Summary table of the 5 best sites and the 5 worst ones

WebsiteEnergy consumption (mAh)Exchanged data (Mo)Memory consumption (Mo)
La Redoute18.15390.9

Do you want to access the results of a particular site? Contact us!

Find our latest study: GPS Apps
Comparative study ideas? Contact us!

2019 Ranking of GPS applications

Reading Time: 3 minutes

Smartphone navigation apps are our daily tools for car, bike or on-foot navigation. They are regularly used in our business or personal activities. It is also a precious tool for holidays. And it is not uncommon to have two applications installed.

Geolocation activity can be activated on your smartphone but it will cost you an average battery consumption that doubles or even triple depending on the applications and use cases! Pay attention to this parameter for a level of precision that will be in most cases, useless. The particularity of these tools is that they can work in online mode and others only work in offline mode with pre-loading map data before navigation. Even though there are significant differences between these 10 applications for a result of movement and information quite comparable. It’s up to you to choose the most relevant!

For this GPS applications ranking, GREENSPECTOR measured the most used apps on the Google Play Store.

Energy consumption for 1 journey of 3 minutes

Regarding the battery consumption for a simple journey over a period of 3 minutes corresponding to an average simulated movement of 40 km per hour, we observe a very varied consumption between those applications. There is a 45% difference in consumption between Here WeGo and Coyote, both in the online mapping category.

Exchanged data for 1 journey of 3 minutes

In terms of data, Here WeGo and Tomtom GPS are by far the most consuming ones with an exchanged data between 2 and 3 MB. TomTom GPS is both a consuming app in prior mapping (1.3 GB pre-loaded) but also in exchanged data during navigation. ViaMichelin is the least data consuming one for online mapping applications with 113 KB of data consumed.

Memory consumption for 1 journey of 3 minutes

There is a 70% difference in memory consumption between Waze and ViaMichelin, to make this journey in a panel where all applications consume between 241 MB and 800 MB. The application Waze, one of the least consuming, will be able to work on older platforms while the ViaMichelin application will be more demanding on the phone’s memory requirements.

Ecoscore on a standardized journey without movement

The EcoScore reflects the consumption of resources (CPU, memory, data,…) and energy on the first screen of the application. The top 1 award goes to Google Maps, which scores 81 out of 100! In heavy applications in resource consumption and energy TomToom GPS, Waze and Navmii are much more resourceful. MapFactor wasn’t ranked because the application has a different behavior on its first screen compared to the other applications.


ApplicationVersionDownloadsPlaystore gradeOfflinePrior download (GB)Energy consumption (mAh)Exchanged data (MB)Memory consumption (MB)Ecoscore (/100)
Coyote11.1.9201 000 000+3.9No056.30.34243143
Google Maps9.67.15 000 000 000+4.3No044.80.47830482
Here WeGo2.0.1317310 000 000+4.4No038.82.234346
MapFactor5.0.6310 000 000+4.5Yes1.254.600N/A
Navmii3.7.1310 000 000+4.0Yes2.248.50.06955032
Offline Maps Navigation17.9.410 000 000+4.7YesFrance=1.4 Regional= 10-200 Mo41.5079653
Sygic18.1.450 000 000+4.4YesFrance=2 Regional= 7-250 Mo40.80.03524144
TomTom GPS1.17.710 000 000+4.1Yes1.355.92.7535240
ViaMichelin8.3.35 000 000+4.3No 51.10.11363359
Waze4.52.5.5100 000 000+4.6No 52.50.36440438

The measurements were made by our laboratory on the basis of a standardized protocol: Smartphone Nexus 6, Android 6, Wi-Fi, low brightness. 4 campaigns were carried out and the value used is the average of these 4 measures.

To carry out these measurements, we measured at the same time a technical course with a phase of loading of the application, a phase of inactivity foreground with displayed app in the foreground and a phase of inactivity with app in the background. This step was done without any movement. Only 9 applications were ranked out of the 10 in ecoscores because one wasn’t comparable with the others on its first screen operation. To measure the movement consumption of these tools, we simulated a movement of less than 5km with a GPS data simulator that allows us to obtain a result very close to a real result.

Find our lastest ranking: Energy consumption of the 30 most popular mobile apps in the world
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Benchmark study of the web eco-responsibility of 20 Postal Companies in the world

Reading Time: 4 minutes

Postal services around the world are changing. Digital has gone through this … the traditional mail business is only 28% for La Poste Group in France. New businesses all based on digital tools are being validated or deployed to take over and allow new levers of growth and profitability for these organizations that have often lived on monopoly situations. All this digital transformation is accompanied by a societal transformation and a consideration of environmental issues.

Where are these companies in this transformation? Few indices or indicators of concrete results of this triple transformation. The website of these organizations is a “visible” symbol of this transformation. The site:

  • Is it inclusive (People), do you need a lot of resources to navigate and do you put a lot of people in the service?
  • is he sober (Planet), consumes a lot of energy on a device, a lot of requests on our servers, a lot of data on networks
  • Is it powerful (Profit)? Is it displayed quickly?

Admittedly, the perimeters of postal activity in the world vary significantly from one country to another in the context of this economic transformation. Admittedly, the proposed benchmark is not exhaustive and does not measure all the pages of the site. It nevertheless allows to get a good idea of the level of maturity of digital eco-design.

Synthesis of results by Greenspector ECOSCORE

The Ecoscore takes into account the energy consumption, the memory used, the data exchanged, the number of queries and other metrics that contribute to the level of eco-design of a Web to a score of 100 for a website or a page. It is a perfect synthesis of this study and all the indicators presented below that will make it possible to explain the main points of work to analyze and improve.

An excellent result for Belgium, example of sobriety on all the fields and which surpasses all the other countries in our benchmark. Good job for Norway and Great Britain ! To be improved for South Korea, Portugal, Canada, France, Denmark, Austria, Luxembourg and Finland. France in the second third must progress on this topic of digital eco-responsibility. Last rankings for Italy, Spain and Brazil.

The energy consumption of a website:

This energy consumption will vary between 3 and 5 mAh, or 66% difference on a simple scenario between the Belgian website and the Finnish website. Note that the distribution is rather homogeneous and that the average is about 4 mAh. The French Post is in 5th place with 3.71 mAh.

Data exchanged:

The difference is very important between the less and the more “voracious in data”. we can divide by 11 between the Belgian Post Office (0.38 MB) and the Australian Post (over 4.4 MB). The French company ranks 6th.

Memory Consumption:

Belgium still has the place of honor in this classification with a consumption very lower than all other websites with a small difference between the best and the last, Portugal (42%) but a gap of 20% between the second and the last. latest. France ranks in 11th position.

CPU Consumption:

A significant consumption ratio between the first, Belgium and the last Spain (ratio of over 4). France ranks 9th.

The number of requests sent to the data centers:

An important ratio between the first, Belgium and the last, Italy with a ratio of 36! Many requests for Finland (171), France (174) and Italy (180). France and Finland share the last places with about 10 kb of data averaged per query versus 117 kb on average for Ireland. The number of requests is a factor increasing the consumption on the device of the user but also on the solicitation of the servers. Objective: group queries to limit the consumption.

Table of raw results:

CountriesWebsitesEnergy consumption (mAh)Data exchanged (100 MB)Memory consumption (100 MB)Number of queriesCPU (%)Ecoscore (on 100)
South Koreawww.koreapost.kr4,34,3552,2353,7%44
Great Britainwww.royalmail.com3,20,73514,2611,9%65
Average 3,92,7561,2822,6%47,9
Min 30,3433,250,9%32
Max 4,94,4618,61803,9%83

This test was performed under the following conditions:

  • Measured the 06/28/2019 on real device Galaxy S7 (Android 8)
  • Private Wi-Fi network, Chrome browser
  • Protocol used 1 minute and 10 seconds of test on the homepage: 20 seconds of loading, 20 seconds of idle foreground, 10 seconds of scroll, 20 seconds in idle background.

5 keys to Application success

Reading Time: 3 minutes

You work hard on the design, ergonomics and UI which are prerequisites to the success of your application. But that’s not enough: more than 7 out of 10 users are ready to uninstall an application if they feel it to be too slow. Battery consumption is also a leading criterion for them. But how can you master these “technical” aspects, when you are a Product owner or Business owner? Now there is a solution…

Continue reading “5 keys to Application success”