# 21 Trainer vs Never Bust

The clearest difference is iOS requirement: Never Bust at 16.0 against 21 Trainer's 26.0. 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.

## The numbers

| Metric | 21 Trainer | Never Bust |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 4 MB | 9 MB |
| Requires iOS | 26.0 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jan Haider](https://appshunter.io/developer/1793934579) | [Olivier Devaux](https://appshunter.io/developer/6773173099) |

## What reviewers say

### 21 Trainer

[App page](https://appshunter.io/ios/app/21-trainer/id6756545201)

**In-app purchases:** none


### Never Bust

[App page](https://appshunter.io/ios/app/never-bust/id6781117246)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 21 Trainer free?

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

### Is Never Bust free?

Never Bust is free to download, with no in-app purchases.

### Do 21 Trainer or Never Bust have ads?

Neither 21 Trainer nor Never Bust 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.*