# Solar Circadian Clock vs Stamina

The clearest difference is in-app purchases: Stamina at none against Solar Circadian Clock's 1. Stamina also leads on ads (none vs shown). Solar Circadian Clock's advantage is iOS requirement (13.0 vs 26.1). 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. Stamina asks for nothing beyond the download.

## The numbers

| Metric | Solar Circadian Clock | Stamina |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | — | Every 6 days |
| Size | 33 MB | 3 MB |
| Requires iOS | **13.0** | 26.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Damien Devillian](https://appshunter.io/developer/1785838605) | [Alberto Bustillos](https://appshunter.io/developer/1859282921) |

## What reviewers say

### 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 |


### Stamina

[App page](https://appshunter.io/ios/app/stamina/id6756220639)

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

**In-app purchases:** none


## Frequently asked questions

### Is Solar Circadian Clock free?

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

### Is Stamina free?

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

### Do Solar Circadian Clock or Stamina have ads?

Solar Circadian Clock shows ads; Stamina 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.*