# Union Catalog vs StudyGlen

The clearest difference is in-app purchases: Union Catalog at none against StudyGlen's 3. Union Catalog also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price and ads there is nothing between them.

Both are free to download. StudyGlen sells 3 one-off in-app purchases. Union Catalog asks for nothing beyond the download.

## The numbers

| Metric | Union Catalog | StudyGlen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Size | 25 MB | 65 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kaung Htet Aung](https://appshunter.io/developer/1884302917) | [Tuncay Technologies LTD](https://appshunter.io/developer/1896344139) |

## What reviewers say

### Union Catalog

[App page](https://appshunter.io/ios/app/union-catalog/id6761687038)

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

**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 (3)**

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


## Frequently asked questions

### Is Union Catalog free?

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

### Is StudyGlen free?

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

### Do Union Catalog or StudyGlen have ads?

Neither Union Catalog nor StudyGlen shows ads.

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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.*