# Stamina vs SunSync

The clearest difference is in-app purchases: Stamina at none against SunSync's 2. Stamina also leads on update cadence (every 6 days vs every 3 weeks). SunSync's advantage is iOS requirement (17.6 vs 26.1). On price, ads and device support there is nothing between them.

Both are free to download. SunSync sells 2 in-app purchases, starting at $1.99 per year. Stamina asks for nothing beyond the download.

Stamina ships an update every 6 days, SunSync every 3 weeks. Both last shipped on October 11, 2026.

## The numbers

| Metric | Stamina | SunSync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Every 3 weeks |
| Size | 3 MB | 22 MB |
| Requires iOS | 26.1 | **17.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Alberto Bustillos](https://appshunter.io/developer/1859282921) | [Marta Rodriguez](https://appshunter.io/developer/1873973295) |

## What reviewers say

### Stamina

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

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

**In-app purchases:** none


### SunSync

[App page](https://appshunter.io/ios/app/sunsync-circadian-tracker/id6762293528)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Year | $1.99 | per year |
| Lifetime | $2.99 | one-time |


## Frequently asked questions

### Is Stamina free?

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

### Is SunSync free?

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

### Do Stamina or SunSync have ads?

Neither Stamina nor SunSync shows ads.

### Which is updated more often, Stamina or SunSync?

Stamina ships an update every 6 days, and SunSync every 3 weeks. Most recently, Stamina was updated on October 11, 2026 and SunSync on October 11, 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.*