# sleep² sleeptracker & analysis vs Fitbook.me

The clearest difference is in-app purchases: Fitbook.me at none against sleep² sleeptracker & analysis's 4. Fitbook.me also leads on update cadence (every 2 days vs every 2 weeks). sleep² sleeptracker & analysis's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. sleep² sleeptracker & analysis sells 4 in-app purchases, starting at $9.99 per month. Fitbook.me asks for nothing beyond the download.

sleep² sleeptracker & analysis ships an update every 2 weeks, Fitbook.me every 2 days. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | sleep² sleeptracker & analysis | Fitbook.me |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (37 ratings)](https://appshunter.io/ios/app/sleep-sleeptracker-and-analysis/id1629426238/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 61.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 110 MB | 26 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nukkuaa](https://appshunter.io/developer/1629426240) | [Dariusz Zalewski](https://appshunter.io/developer/6794330532) |

## What reviewers say

### sleep² sleeptracker & analysis

[App page](https://appshunter.io/ios/app/sleep-sleeptracker-and-analysis/id1629426238)

This app acts as a personal guide to better sleep, combining innovative sleep training with precise sleep tracking and analysis. It offers an EU-approved medical device program for acute sleep disorders like insomnia, providing personalized recommendations and sleep training based on your data.

**Highlights:** Sleep tracking and analysis, Sleep training programs, Personalized recommendations, Interactive chatbot, Data import (Polar sensor, Apple Health), Manual sleep diary entry

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| sleep² PRO | $9.99 | per month |
| sleep² PRO | $79.99 | per year |
| sleep² intensive program | $39.99 | one-time |
| sleep² intensive program | $99.99 | one-time |


### Fitbook.me

[App page](https://appshunter.io/ios/app/fitbookme/id6795073435)

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

**In-app purchases:** none


## Frequently asked questions

### Is sleep² sleeptracker & analysis free?

sleep² sleeptracker & analysis is free to download, with in-app purchases available.

### Is Fitbook.me free?

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

### Do sleep² sleeptracker & analysis or Fitbook.me have ads?

Neither sleep² sleeptracker & analysis nor Fitbook.me shows ads.

### Which is updated more often, sleep² sleeptracker & analysis or Fitbook.me?

sleep² sleeptracker & analysis ships an update every 2 weeks, and Fitbook.me every 2 days. Most recently, sleep² sleeptracker & analysis was updated on October 25, 2026 and Fitbook.me on October 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*