# Performance Rock vs B

The clearest difference is iOS requirement: Performance Rock at 12.0 against B's 17.0. 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 | Performance Rock | B |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 39 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Physical Technologies LTD](https://appshunter.io/developer/822656926) | [Amir Rahav](https://appshunter.io/developer/1855675533) |

## What reviewers say

### Performance Rock

[App page](https://appshunter.io/ios/app/performance-rock/id1613519370)

**Features:** macOS Compatibility

**In-app purchases:** none


### B

[App page](https://appshunter.io/ios/app/b-habbits/id6788882984)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Performance Rock free?

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

### Is B free?

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

### Do Performance Rock or B have ads?

Neither Performance Rock nor B 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.*