# ACM Collection vs LetterRack

The clearest difference is in-app purchases: ACM Collection at none against LetterRack's 3. ACM Collection also leads on iOS requirement (17.5 vs 26.4). On price, ads and device support there is nothing between them.

Both are free to download. LetterRack sells 3 in-app purchases, starting at $3.99 per month. ACM Collection asks for nothing beyond the download.

## The numbers

| Metric | ACM Collection | LetterRack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 69 MB | 28 MB |
| Requires iOS | **17.5** | 26.4 |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Feiyu Chang](https://appshunter.io/developer/1492595678) | [Vincent Launay](https://appshunter.io/developer/1198218316) |

## What reviewers say

### ACM Collection

[App page](https://appshunter.io/ios/app/acm-collection/id6742438231)

**Features:** macOS Compatibility

**In-app purchases:** none


### LetterRack

[App page](https://appshunter.io/ios/app/letterrack/id6764377699)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Xtremagic Pass | $3.99 | per month |
| Xtremagic Pass | $24.99 | per year |
| Full Access (One-Time Purchase) | $7.99 | one-time |


## Frequently asked questions

### Is ACM Collection free?

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

### Is LetterRack free?

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

### Do ACM Collection or LetterRack have ads?

Neither ACM Collection nor LetterRack 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.*