# TK vs XTRAFIT

The clearest difference is update cadence: TK at every 9 days against XTRAFIT's every 2 months. TK also leads on ratings volume (1.2K vs 12) and review sentiment (72% vs 50%). XTRAFIT's advantage is iOS requirement (15.0 vs 18.0). On price, ads, in-app purchases and monetization model 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 4.6. That said, the two scores are not equally well evidenced: TK has 1.2K ratings behind it against 12, 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 50% of XTRAFIT's.

TK ships an update every 9 days, XTRAFIT every 2 months. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | TK | XTRAFIT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/tk-app/id1163694230/reviews)** | [4.6 (12 ratings)](https://appshunter.io/ios/app/xtrafit/id1643481427/reviews) |
| Number of ratings | **1.2K** | 12 |
| Positive reviews | **72.4% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Monetization | Free | Free |
| Size | 539 MB | 100 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) | [XTRAFIT Service GmbH](https://appshunter.io/developer/1643481429) |

## 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


### XTRAFIT

[App page](https://appshunter.io/ios/app/xtrafit/id1643481427)

Manage your fitness journey from workout planning to membership details. This app centralizes all your training needs, offering a personalized experience. It integrates with HealthKit to track activity data and encourage consistent exercise.

**Highlights:** Workout planning, Membership management, Studio utilization tracking, Personalized training insights, HealthKit integration

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

**In-app purchases:** none


## Frequently asked questions

### Is TK free?

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

### Is XTRAFIT free?

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

### Which has better reviews, TK or XTRAFIT?

TK is rated higher. TK averages 4.8 out of 5 from 1.2K ratings, while XTRAFIT averages 4.6 from 12 ratings.

### Do TK or XTRAFIT have ads?

Neither TK nor XTRAFIT shows ads.

### Which is updated more often, TK or XTRAFIT?

TK ships an update every 9 days, and XTRAFIT every 2 months. Most recently, TK was updated on October 15, 2026 and XTRAFIT on October 14, 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.*