# Circadian Rhythm vs Combin

The clearest difference is iOS requirement: Circadian Rhythm at 13.0 against Combin's 15.5. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Circadian Rhythm sells 5 in-app purchases, starting at $3.99 per 7 days and Combin sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Circadian Rhythm | Combin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (6 ratings)](https://appshunter.io/ios/app/circadian-rhythm-dawnpal/id6499448034/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 78 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ingo Augsten](https://appshunter.io/developer/1720651715) | [Yusuf Erkam Ozyer](https://appshunter.io/developer/1891039631) |

## What reviewers say

### Circadian Rhythm

[App page](https://appshunter.io/ios/app/circadian-rhythm-dawnpal/id6499448034)

This app helps you align with natural daylight cycles for better sleep and increased energy. It uses your location to determine sunrise times and calculates an ideal bedtime based on your desired sleep duration, promoting a healthier start to your day.

**Highlights:** Aligns with natural sun cycle, Calculates ideal bedtime, Detects location for sunrise, Promotes better sleep, Increases daily energy

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| us-en | $3.99 | per 7 days |
| Yearly Plan | $19.99 | per year |
| Lifetime - vote a feature | $3.99 | one-time |
| Lifetime - "your" feature | $17.99 | one-time |
| Lifetime Access | $49.99 | one-time |


### Combin

[App page](https://appshunter.io/ios/app/combin/id6761712923)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Combin Pro | $4.99 | per month |
| Combin Premium | $12.99 | per month |


## Frequently asked questions

### Is Circadian Rhythm free?

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

### Is Combin free?

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

### Do Circadian Rhythm or Combin have ads?

Neither Circadian Rhythm nor Combin shows ads.

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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.*