# Hourly Bio Rhythm vs Rytha

The clearest difference is update cadence: Rytha at every 4 days against Hourly Bio Rhythm's every 3 months. Rytha 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. Hourly Bio Rhythm sells 1 one-off in-app purchase and Rytha sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Hourly Bio Rhythm ships an update every 3 months, Rytha every 4 days. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Hourly Bio Rhythm | Rytha |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Size | 5 MB | 3 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ceos Consulting](https://appshunter.io/developer/1849121672) | [Thomas Stahmer](https://appshunter.io/developer/6799920369) |

## What reviewers say

### Hourly Bio Rhythm

[App page](https://appshunter.io/ios/app/hourly-bio-rhythm/id6780152403)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Daily Energy Pulse Pro | $1.99 | one-time |


### Rytha

[App page](https://appshunter.io/ios/app/rytha/id6811962385)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rytha Premium | $5.99 | one-time |


## Frequently asked questions

### Is Hourly Bio Rhythm free?

Hourly Bio Rhythm is free to download, with in-app purchases available.

### Is Rytha free?

Rytha is free to download, with in-app purchases available.

### Do Hourly Bio Rhythm or Rytha have ads?

Neither Hourly Bio Rhythm nor Rytha shows ads.

### Which is updated more often, Hourly Bio Rhythm or Rytha?

Hourly Bio Rhythm ships an update every 3 months, and Rytha every 4 days. Most recently, Hourly Bio Rhythm was updated on October 25, 2026 and Rytha on October 26, 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.*