# 4 vs StudyGlen

The clearest difference is in-app purchases: 4 at none against StudyGlen's 4. 4 also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.4). On price, update cadence and ads there is nothing between them.

Both are free to download. StudyGlen sells 4 one-off in-app purchases. 4 asks for nothing beyond the download.

4 ships an update every 4 days, StudyGlen every 6 days. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 4 | StudyGlen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 6 days |
| Size | 8 MB | 65 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Holmes](https://appshunter.io/developer/1525696513) | [Tuncay Technologies LTD](https://appshunter.io/developer/1896344139) |

## What reviewers say

### 4

[App page](https://appshunter.io/ios/app/4-mation/id1525696511)

**Features:** macOS Compatibility

**In-app purchases:** none


### StudyGlen

[App page](https://appshunter.io/ios/app/studyglen-ai-flashcard-maker/id6766991962)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mini Pack | $5.99 | one-time |
| Starter Pack | $11.99 | one-time |
| Plus Pack | $29.99 | one-time |
| Pro Pack | $59.99 | one-time |


## Frequently asked questions

### Is 4 free?

4 is free to download, with no in-app purchases.

### Is StudyGlen free?

StudyGlen is free to download, with in-app purchases available.

### Do 4 or StudyGlen have ads?

Neither 4 nor StudyGlen shows ads.

### Which is updated more often, 4 or StudyGlen?

4 ships an update every 4 days, and StudyGlen every 6 days. Most recently, 4 was updated on October 6, 2026 and StudyGlen on October 25, 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.*