Comparison

carbonTracker vs ProtAct17

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

carbonTracker

Features
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carbonTracker โ€“ what sounds like a comic is a new sustainability app that leverages gamification to help us, each and every individual user, improve our carbon footprint both at home and at work. Living more sustainably is something we all want, but what is the best way to go about it? carbonTracker can help. The idea behind the app is that all of us can bring more sustainability to our lives every day, not only in professional setting but also in private lives. Have fun learning about Sustainability, join friendly competition with friends, family and colleagues, and earn points to exchange to tangible rewards inside carbonTracker app, while we help you tally and reduce your personal environmental footprint with our key features: Personal carbon calculator: How does your footprint compare to the average European, your country or your BASF colleagues? Have a look! Challenges: Take a quiz or compete with colleagues to earn points and badges Community: Share your sustainability ideas and knowledge and help the greenZorro Community to grow!

About

ProtAct17

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The app aims to provide children and adolescents with a playful approach to the complex topic of sustainability and the 17 sustainability goals of the United Nations. ProtAct17 imparts knowledge in an age-appropriate and interactive way, arouses curiosity and the spirit of research through virtual and real experiments, addresses current and future challenges for the environment, economy and society and shows their own โ€“ albeit small โ€“ possibilities for action. Inspiring and empowering students to protect the environment (Protect) and to take action in line with the 17 sustainability goals of the United Nations (Act) โ€“ this is the idea behind the app. Using the scan mode, children can bring the app's poster to life and explore the topics step by step.

Screenshots

carbonTracker4 screens
ProtAct174 screens

Verdict

The call

The clearest difference is update cadence: carbonTracker at every 2 months against ProtAct17's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

carbonTracker ships an update every 2 months, ProtAct17 every 9 months. The most recent releases landed on September 21, 2026 and September 13, 2026 respectively.

Scorecard1 real difference ยท 5 level
carbonTracker versus ProtAct17: the parameters behind the verdict, then further details
ParametercarbonTrackerProtAct17
PriceFreeFree
Update frequencyEvery 2 months โ€” betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details โ€” not scored
Size83 MB187 MB
Age rating4+4+
DeveloperBASF Digital Solutions GmbHKIDS interactive GmbH

In-app purchases

None

carbonTracker

No in-app purchases

None

ProtAct17

No in-app purchases

Questions

Is carbonTracker free?
carbonTracker is free to download, with no in-app purchases.
Is ProtAct17 free?
ProtAct17 is free to download, with no in-app purchases.
Do carbonTracker or ProtAct17 have ads?
Neither carbonTracker nor ProtAct17 shows ads.
Which is updated more often, carbonTracker or ProtAct17?
carbonTracker ships an update every 2 months, and ProtAct17 every 9 months. Most recently, carbonTracker was updated on September 21, 2026 and ProtAct17 on September 13, 2026.

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