# Multi Biorhythm2 vs Solar Circadian Clock

The clearest difference is in-app purchases: Multi Biorhythm2 at none against Solar Circadian Clock's 1. Multi Biorhythm2 also leads on ads (none vs shown) and iOS requirement (11.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. Solar Circadian Clock sells 1 one-off in-app purchase. Multi Biorhythm2 asks for nothing beyond the download.

## The numbers

| Metric | Multi Biorhythm2 | Solar Circadian Clock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 days | — |
| Size | 30 MB | 33 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Masahiro Sakai](https://appshunter.io/developer/701045247) | [Damien Devillian](https://appshunter.io/developer/1785838605) |

## What reviewers say

### Multi Biorhythm2

[App page](https://appshunter.io/ios/app/multi-biorhythm2/id6445856849)

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

**In-app purchases:** none


### Solar Circadian Clock

[App page](https://appshunter.io/ios/app/solar-circadian-clock/id6739723405)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade | $3.99 | one-time |


## Frequently asked questions

### Is Multi Biorhythm2 free?

Multi Biorhythm2 is free to download, with no in-app purchases.

### Is Solar Circadian Clock free?

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

### Do Multi Biorhythm2 or Solar Circadian Clock have ads?

Solar Circadian Clock shows ads; Multi Biorhythm2 does not.

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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.*