# TK vs FeverApp

The clearest difference is update cadence: TK at every 2 weeks against FeverApp's every 3 months. FeverApp's advantage is iOS requirement (11.0 vs 18.0). 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.

TK ships an update every 2 weeks, FeverApp every 3 months. The most recent releases landed on September 28, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | TK | FeverApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.2K ratings)](https://appshunter.io/ios/app/tk-app/id1163694230/reviews)** | — |
| Number of ratings | **1.2K** | — |
| Positive reviews | 72.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 538 MB | 49 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) | [David Martin](https://appshunter.io/developer/1476835834) |

## 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


### FeverApp

[App page](https://appshunter.io/ios/app/feverapp/id1476835835)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TK free?

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

### Is FeverApp free?

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

### Do TK or FeverApp have ads?

Neither TK nor FeverApp shows ads.

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

TK ships an update every 2 weeks, and FeverApp every 3 months. Most recently, TK was updated on September 28, 2026 and FeverApp on September 9, 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.*