# R21 vs Ann Buddy

The clearest difference is update cadence: Ann Buddy at every 3 weeks against R21's every 3 months. R21's advantage is iOS requirement (9.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

R21 ships an update every 3 months, Ann Buddy every 3 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | R21 | Ann Buddy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 114 MB | 47 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CAVES BOOKS LTD.](https://appshunter.io/developer/547924599) | [MiDo9 Technology Co., Ltd. 米豆奶科技](https://appshunter.io/developer/1584547228) |

## What reviewers say

### R21

[App page](https://appshunter.io/ios/app/r21/id1197252445)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ann Buddy

[App page](https://appshunter.io/ios/app/ann-buddy/id6741045621)

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

**In-app purchases:** none


## Frequently asked questions

### Is R21 free?

R21 is free to download, with no in-app purchases.

### Is Ann Buddy free?

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

### Do R21 or Ann Buddy have ads?

Neither R21 nor Ann Buddy shows ads.

### Which is updated more often, R21 or Ann Buddy?

R21 ships an update every 3 months, and Ann Buddy every 3 weeks. Most recently, R21 was updated on October 10, 2026 and Ann Buddy on September 30, 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.*