# 321.fit vs mocion

The clearest difference is ads: mocion at none against 321.fit's shown. mocion also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, 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.

321.fit ships an update every 5 days, mocion every 9 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | 321.fit | mocion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 9 days |
| Size | 98 MB | 71 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Summer Advisors Ltd](https://appshunter.io/developer/1520978630) | [Mocion LTD](https://appshunter.io/developer/1788872056) |

## What reviewers say

### 321.fit

[App page](https://appshunter.io/ios/app/321fit/id6471964595)

**In-app purchases:** none


### mocion

[App page](https://appshunter.io/ios/app/mocion/id6740315668)

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

**In-app purchases:** none


## Frequently asked questions

### Is 321.fit free?

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

### Is mocion free?

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

### Do 321.fit or mocion have ads?

321.fit shows ads; mocion does not.

### Which is updated more often, 321.fit or mocion?

321.fit ships an update every 5 days, and mocion every 9 days. Most recently, 321.fit was updated on October 24, 2026 and mocion on October 24, 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.*