# TK vs FitX App

The clearest difference is rating: TK at 4.8 against FitX App's 3.5. TK also leads on ratings volume (1.2K vs 10) and review sentiment (72% vs 64%). FitX App's advantage is device support (3 vs 1) and iOS requirement (15 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

TK holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: TK has 1.2K ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 72% of TK's written reviews are positive against 64% of FitX App's.

Both ship on a similar rhythm, roughly fortnightly. Both last shipped on September 22, 2026.

## The numbers

| Metric | TK | FitX App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/tk-app/id1163694230/reviews)** | [3.5 (10 ratings)](https://appshunter.io/ios/app/fitx-app/id6444621085/reviews) |
| Number of ratings | **1.2K** | 10 |
| Positive reviews | **72.4% of reviews** | 63.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | Free |
| Size | 546 MB | 109 MB |
| Requires iOS | 18.0 | **15** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) | [FitX Verwaltung GmbH](https://appshunter.io/developer/1641136360) |

## What reviewers say

### TK

[App page](https://appshunter.io/ios/app/tk-app/id1163694230)

Manage your health insurance digitally. Upload receipts, view sick notes, and track fitness for bonus points. Securely communicate with your provider and access your health data.

**Highlights:** Digital receipt uploads, View sick notes, Secure messaging with provider, Digital bonus program, Fitness tracking via Apple Health/Fitbit, Access to health data (TK-Safe)

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent app for English speakers
- 🚀 Excellent customer service
- 👍 Easy to use and intuitive
- 👍 Comprehensive features
- 👍 Smooth and fast

**What reviewers complain about**

- 🐛 Compatibility issues with older devices
- 🐛 Synchronization problems with Apple Health
- 🐛 Login and activation issues after updates
- 🐛 Buggy submission of sick notes
- 🐛 Incomplete English translations

**Reported bugs**

- Login issues after updates
- Incompatibility with older devices
- Synchronization problems with Apple Health
- Errors when submitting sick notes
- Incomplete English translations

**Requested features**

- English language support for all features
- Integration with more fitness tracking apps
- Larger QR code display in wallet for easier scanning
- Ability to view and manage bonus program details
- Improved data synchronization and real-time updates


### FitX App

[App page](https://appshunter.io/ios/app/fitx-app/id6444621085)

Achieve your fitness goals, from fitting into old clothes to building muscle. This app simplifies your journey to a healthier, more mobile you. Get ready to feel great in your body.

**Highlights:** Body recomposition guidance, Improved flexibility, Muscle building support, Personalized fitness journey, Studio integration

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is TK free?

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

### Is FitX App free?

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

### Which has better reviews, TK or FitX App?

TK is rated higher. TK averages 4.8 out of 5 from 1.2K ratings, while FitX App averages 3.5 from 10 ratings.

### Do TK or FitX App have ads?

Neither TK nor FitX App shows ads.

### Which is updated more often, TK or FitX App?

TK ships an update fortnightly, and FitX App fortnightly. Most recently, TK was updated on September 22, 2026 and FitX App 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.*