# WaistProof vs Rhythmus

The clearest difference is update cadence: Rhythmus at every 2 days against WaistProof's every 8 days. 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.

WaistProof ships an update every 8 days, Rhythmus every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | WaistProof | Rhythmus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Size | 50 MB | 20 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Dan Tong](https://appshunter.io/developer/1889379985) | [Patrick Sarpen](https://appshunter.io/developer/6804829454) |

## What reviewers say

### WaistProof

[App page](https://appshunter.io/ios/app/waistproof-waist-tracker/id6761399338)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rhythmus

[App page](https://appshunter.io/ios/app/rhythmus-cycle-syncing/id6804829452)

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

**In-app purchases:** none


## Frequently asked questions

### Is WaistProof free?

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

### Is Rhythmus free?

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

### Do WaistProof or Rhythmus have ads?

Neither WaistProof nor Rhythmus shows ads.

### Which is updated more often, WaistProof or Rhythmus?

WaistProof ships an update every 8 days, and Rhythmus every 2 days. Most recently, WaistProof was updated on October 25, 2026 and Rhythmus 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.*