Comparison

ProtAct17 vs studycharge

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

Head to head
About

ProtAct17

Read full description

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.

About

studycharge

Features
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Create your own flashcards and master any topic with smart spaced repetition powered by the SM-2 algorithm. Go beyond simple memorization by adding cloze texts to deepen your understanding. Learn together with the community by discovering and sharing public flashcard sets, or collaborate privately with friends. Turn learning into a challenge by competing head-to-head and see who performs best. Stay motivated with weekly leaderboards among your followers and track who learns the most cards each week. Whether you study alone or with others, this app makes learning efficient, social, and engaging. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ProtAct174 screens
studycharge4 screens

Verdict

The call

The clearest difference is in-app purchases: ProtAct17 at none against studycharge's 2. ProtAct17 also leads on iOS requirement (13.0 vs 15.1). studycharge's advantage is update cadence (every 4 days vs every 9 months). On price, ads 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. studycharge sells 2 in-app purchases, starting at $3.99 per month. ProtAct17 asks for nothing beyond the download.

UpkeepUpdate frequency

ProtAct17 ships an update every 9 months, studycharge every 4 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

Scorecard3 real differences ยท 3 level
ProtAct17 versus studycharge: the parameters behind the verdict, then further details
ParameterProtAct17studycharge
PriceFreeFree
Update frequencyEvery 9 monthsEvery 4 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 โ€” better15.1
Further details โ€” not scored
Size187 MB57 MB
Age rating4+4+
DeveloperKIDS interactive GmbHTim Stieger

In-app purchases

None

ProtAct17

No in-app purchases

2 purchases

studycharge

Subscriptions1
  • Premium Monthly$3.991 Month
One-time1
  • Premium Lifetime$34.99

Questions

Is ProtAct17 free?
ProtAct17 is free to download, with no in-app purchases.
Is studycharge free?
studycharge is free to download, with in-app purchases available.
Do ProtAct17 or studycharge have ads?
Neither ProtAct17 nor studycharge shows ads.
Which is updated more often, ProtAct17 or studycharge?
ProtAct17 ships an update every 9 months, and studycharge every 4 days. Most recently, ProtAct17 was updated on November 7, 2026 and studycharge on November 5, 2026.

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