TK vs FitX App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TK
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.
- 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)
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“Die Techniker” provides its customers with a digital all-purpose tool. For example, you can use this app to upload your receipts for reimbursement, view existing sick notes, or do something for your fitness while collecting bonus points." FEATURES - Protection of sensitive data through secure login (e.g. no jailbreak allowed) - Transmission of sick notes and documents - Send messages to the Techniker - Receive letters from the Techniker - Use the TK Bonus Program completely digitally - TK-Fit with access to Apple Health or Fitbit - Overview of prescribed drugs of the last six years - Apply for reimbursement of costs for medicines, vaccines, osteopathy and health courses SECURITY As a statutory health insurance company, we are committed to the best possible protection of your health data. That's why we check your identity when setting up TK-App on your smartphone. You can either identify yourself online using your ID card and PIN via the Nect Wallet app or by entering an activation code. We‘ll send you the activation code via post. You can find everything else about our security concept at www.tk.de/tk/942778 Note: The use of TK-App with jailbroken devices is generally not possible. FURTHER DEVELOPMENT We are continuously adding new features to TK-App - your ideas and hints help us most. Write us directly and anonymously via the feedback function in TK-App. BONUS & TK-Fit Membership in a football club, regular check-ups at the dentist, the non-smoking course after New Year's Day - all these things earn points for the TK Bonus Program. And thanks to the connection to Apple Health or Fitbit, you'll receive points for many other activities. TK-SAFE With TK-Safe you have all relevant health data at a glance: Your visits to the doctor, diagnoses, medication, vaccinations, preventative medical checkups and much more. Please note that TK-Fit and TK-Safe are not available in English yet. REQUIREMENTS For the TK-App: - TK customer - iOS 18 or higher - No device with modified operating system, e.g. Jailbreak (For more information, see www.tk.de/tk/942782) For TK-Fit: - Step counting using Apple Health or Fitbit and your smartphone or a compatible fitness tracker (for information on TK-Fit, see www.tk.de/tk/938122) ACCESSIBILITY We aim at providing you an app that is as barrier-free as possible. You can find the accessibility statement at https://www.tk.de/techniker/2137808.
FitX App
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.
- Body recomposition guidance
- Improved flexibility
- Muscle building support
- Personalized fitness journey
- Studio integration
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Du willst dich in deinem Körper wohlfühlen, wieder in deine Lieblingsjeans passen, beweglicher werden oder einfach einen dickeren Bizeps haben? Dann ist die FitX-App genau das Richtige für dich. Mit der FitX-App wird alles einfacher – außer deine Hanteln. Wir sehen uns im Studio. Dein FitX-Team
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | TK | FitX App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (1.2K ratings) — better | 3.5 (10 ratings) |
| Positive reviews | 72.4% of reviews — better | 63.6% of reviews |
| Number of ratings | 1.2K — better | 10 |
| Update frequency | Fortnightly | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 15 — better |
| Further details — not scored | ||
| Size | 546 MB | 109 MB |
| Age rating | 12+ | 4+ |
| Developer | Techniker Krankenkasse (TK) | FitX Verwaltung GmbH |
Customer experience
TK
FitX App
Bugs and requests
TK
Reported bugs
5 issues- Login issues after updates
- Incompatibility with older devices
- Synchronization problems with Apple Health
- Errors when submitting sick notes
- Incomplete English translations
Requested features
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
TK
No in-app purchases
FitX App
No in-app purchases









