# ProtAct17 vs studycharge

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.

Both are free to download. studycharge sells 2 in-app purchases, starting at $3.99 per month. ProtAct17 asks for nothing beyond the download.

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.

## The numbers

| Metric | ProtAct17 | studycharge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 days** |
| Size | 187 MB | 57 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KIDS interactive GmbH](https://appshunter.io/developer/731500021) | [Tim Stieger](https://appshunter.io/developer/1869739970) |

## What reviewers say

### ProtAct17

[App page](https://appshunter.io/ios/app/protact17/id6446908812)

**In-app purchases:** none


### studycharge

[App page](https://appshunter.io/ios/app/studycharge/id6757936220)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $3.99 | per month |
| Premium Lifetime | $34.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*