# Cycle Sync Running Coach vs Rhythmus

The clearest difference is in-app purchases: Rhythmus at none against Cycle Sync Running Coach's 2. Rhythmus also leads on update cadence (every 2 days vs every 5 days) and iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Cycle Sync Running Coach sells 2 in-app purchases, starting at $12.99 per month. Rhythmus asks for nothing beyond the download.

Cycle Sync Running Coach ships an update every 5 days, Rhythmus every 2 days. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Cycle Sync Running Coach | Rhythmus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Size | 6 MB | 20 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Denis Vladimirovic Golubev](https://appshunter.io/developer/6795626062) | [Patrick Sarpen](https://appshunter.io/developer/6804829454) |

## What reviewers say

### Cycle Sync Running Coach

[App page](https://appshunter.io/ios/app/cycle-sync-running-coach/id6795626060)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $12.99 | per month |
| Premium Annual | $79.99 | per year |


### 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 Cycle Sync Running Coach free?

Cycle Sync Running Coach is free to download, with in-app purchases available.

### Is Rhythmus free?

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

### Do Cycle Sync Running Coach or Rhythmus have ads?

Neither Cycle Sync Running Coach nor Rhythmus shows ads.

### Which is updated more often, Cycle Sync Running Coach or Rhythmus?

Cycle Sync Running Coach ships an update every 5 days, and Rhythmus every 2 days. Most recently, Cycle Sync Running Coach was updated on October 14, 2026 and Rhythmus on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*