# Loop Revision vs Retain

The clearest difference is in-app purchases: Retain at none against Loop Revision's 3. Loop Revision's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Loop Revision sells 3 in-app purchases, starting at $4.99 per month. Retain asks for nothing beyond the download.

## The numbers

| Metric | Loop Revision | Retain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Size | 41 MB | 43 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sixmaiti Debbarma](https://appshunter.io/developer/6797239370) | [HonestyVision](https://appshunter.io/developer/1804536258) |

## What reviewers say

### Loop Revision

[App page](https://appshunter.io/ios/app/loop-revision-spaced-review/id6797239368)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Revision Loop Plus | $4.99 | per month |
| Loop Scholar | $9.99 | per month |
| Loop Pro | $19.99 | per month |


### Retain

[App page](https://appshunter.io/ios/app/retain-revision-tracker/id6799671289)

**In-app purchases:** none


## Frequently asked questions

### Is Loop Revision free?

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

### Is Retain free?

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

### Do Loop Revision or Retain have ads?

Neither Loop Revision nor Retain 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.*