# marble.fit vs SweatDiary

The clearest difference is update cadence: SweatDiary at every 4 days against marble.fit's fortnightly. SweatDiary also leads on iOS requirement (18.0 vs 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.

marble.fit ships an update fortnightly, SweatDiary every 4 days. The most recent releases landed on October 22, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | marble.fit | SweatDiary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 10 MB | 7 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | iPhone, iPad | iPhone, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Lorenzo Quaid Sison](https://appshunter.io/developer/1821002361) | [Christoph Werner](https://appshunter.io/developer/1885005040) |

## What reviewers say

### marble.fit

[App page](https://appshunter.io/ios/app/marblefit/id6757725234)

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

**In-app purchases:** none


### SweatDiary

[App page](https://appshunter.io/ios/app/sweatdiary/id6760564598)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is marble.fit free?

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

### Is SweatDiary free?

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

### Do marble.fit or SweatDiary have ads?

Neither marble.fit nor SweatDiary shows ads.

### Which is updated more often, marble.fit or SweatDiary?

marble.fit ships an update fortnightly, and SweatDiary every 4 days. Most recently, marble.fit was updated on October 22, 2026 and SweatDiary on October 13, 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.*