# B3 Runtime vs CrossFit Solid

The clearest difference is update cadence: B3 Runtime at every 3 weeks against CrossFit Solid's every 3 months. 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.

B3 Runtime ships an update every 3 weeks, CrossFit Solid every 3 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | B3 Runtime | CrossFit Solid |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 44 MB | 79 MB |
| Requires iOS | 15.1 | **15** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [B3 Innovation AB](https://appshunter.io/developer/1736498082) | [CrossFit Solid Stockholm](https://appshunter.io/developer/6800284014) |

## What reviewers say

### B3 Runtime

[App page](https://appshunter.io/ios/app/b3-runtime/id6479606796)

**Features:** macOS Compatibility

**In-app purchases:** none


### CrossFit Solid

[App page](https://appshunter.io/ios/app/crossfit-solid/id6711361176)

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

**In-app purchases:** none


## Frequently asked questions

### Is B3 Runtime free?

B3 Runtime is free to download, with no in-app purchases.

### Is CrossFit Solid free?

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

### Do B3 Runtime or CrossFit Solid have ads?

Neither B3 Runtime nor CrossFit Solid shows ads.

### Which is updated more often, B3 Runtime or CrossFit Solid?

B3 Runtime ships an update every 3 weeks, and CrossFit Solid every 3 months. Most recently, B3 Runtime was updated on October 3, 2026 and CrossFit Solid on October 10, 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.*