# Sleep Optimizer vs Caffix

The clearest difference is update cadence: Caffix at every 3 weeks against Sleep Optimizer's every 2 months. Sleep Optimizer's advantage is iOS requirement (13.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Sleep Optimizer ships an update every 2 months, Caffix every 3 weeks. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Sleep Optimizer | Caffix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 21 MB | 314 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Livanda - Internetkliniken AB](https://appshunter.io/developer/1607972909) | [Tunde Timea Bartha](https://appshunter.io/developer/1731109217) |

## What reviewers say

### Sleep Optimizer

[App page](https://appshunter.io/ios/app/sleep-optimizer/id1607972907)

**Features:** macOS Compatibility

**In-app purchases:** none


### Caffix

[App page](https://appshunter.io/ios/app/caffix/id6744583258)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sleep Optimizer free?

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

### Is Caffix free?

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

### Do Sleep Optimizer or Caffix have ads?

Neither Sleep Optimizer nor Caffix shows ads.

### Which is updated more often, Sleep Optimizer or Caffix?

Sleep Optimizer ships an update every 2 months, and Caffix every 3 weeks. Most recently, Sleep Optimizer was updated on October 6, 2026 and Caffix on October 8, 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.*