# sleep² sleeptracker & analysis vs TK

The clearest difference is rating: TK at 4.2 against sleep² sleeptracker & analysis's 3.4. TK also leads on in-app purchases (none vs 4). sleep² sleeptracker & analysis's advantage is update cadence (every 2 weeks vs every 2 months) and ratings volume (34 vs 6). On price, review sentiment, ads and iOS requirement there is nothing between them.

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

TK holds the better App Store score, 4.2 against 3.4. That said, the two scores are not equally well evidenced: sleep² sleeptracker & analysis has 34 ratings behind it against 6, so its average is the more settled of the two. Written reviews complicate that: 57% of sleep² sleeptracker & analysis's written reviews are positive against 52% of TK's, so the app with the better star average is not the one people write more warmly about.

sleep² sleeptracker & analysis ships an update every 2 weeks, TK every 2 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | sleep² sleeptracker & analysis | TK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (34 ratings)](https://appshunter.io/ios/app/sleep-sleeptracker-and-analysis/id1629426238/reviews) | **[4.2 (6 ratings)](https://appshunter.io/ios/app/tk-coach/id6444313653/reviews)** |
| Number of ratings | **34** | 6 |
| Positive reviews | **56.6% of reviews** | 51.9% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 107 MB | 68 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Nukkuaa](https://appshunter.io/developer/1629426240) | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) |

## 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 |


### TK

[App page](https://appshunter.io/ios/app/tk-coach/id6444313653)

Achieve all-round wellbeing with personalized plans for fitness, nutrition, and relaxation. Set goals, track progress with self-tests, and receive motivating tips and recipe suggestions. Integrates with smartwatches for a holistic health overview.

**Highlights:** Personalized coaching plans, Fitness exercises and audio coaching, Extensive recipe database, Meditation and mindfulness exercises, Smartwatch and fitness tracker integration, Progress tracking and self-tests

**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 TK free?

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

### Which has better reviews, sleep² sleeptracker & analysis or TK?

TK is rated higher. sleep² sleeptracker & analysis averages 3.4 out of 5 from 34 ratings, while TK averages 4.2 from 6 ratings.

### Do sleep² sleeptracker & analysis or TK have ads?

Neither sleep² sleeptracker & analysis nor TK shows ads.

### Which is updated more often, sleep² sleeptracker & analysis or TK?

sleep² sleeptracker & analysis ships an update every 2 weeks, and TK every 2 months. Most recently, sleep² sleeptracker & analysis was updated on September 24, 2026 and TK on September 22, 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.*