# The Optimal Lab vs XFIT Mosman

The clearest difference is ads: The Optimal Lab at none against XFIT Mosman's shown. XFIT Mosman's advantage is update cadence (monthly vs every 25 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

The Optimal Lab ships an update every 25 months, XFIT Mosman monthly. Both last shipped on September 16, 2026.

## The numbers

| Metric | The Optimal Lab | XFIT Mosman |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 25 months | **Monthly** |
| Size | 31 MB | 123 MB |
| Requires iOS | 15.6 | **14.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [THE OPTIMAL LAB (ST LEONARDS) PTY LTD](https://appshunter.io/developer/1557251933) | [Jones Street Pty Ltd](https://appshunter.io/developer/1727129890) |

## What reviewers say

### The Optimal Lab

[App page](https://appshunter.io/ios/app/the-optimal-lab/id1593381703)

**Features:** macOS Compatibility

**In-app purchases:** none


### XFIT Mosman

[App page](https://appshunter.io/ios/app/xfit-mosman/id6476560421)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is The Optimal Lab free?

The Optimal Lab is free to download, with no in-app purchases.

### Is XFIT Mosman free?

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

### Do The Optimal Lab or XFIT Mosman have ads?

XFIT Mosman shows ads; The Optimal Lab does not.

### Which is updated more often, The Optimal Lab or XFIT Mosman?

The Optimal Lab ships an update every 25 months, and XFIT Mosman monthly. Most recently, The Optimal Lab was updated on September 16, 2026 and XFIT Mosman on September 16, 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.*