Comparison

TK vs FeverApp

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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)
Read full description

“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.

About

FeverApp

Features
Read full description

FeverApp is your diary to document acute infectious diseases, medication intake, symptoms, vaccines, and more for you and your family. The multimedia library helps to understand illness as a process and fever as a resource of your immune system. It is based on current guidelines regarding fever and febrile diseases. Use the medication scanner to add medicines to your list and track the intake quantity, date and time. FeverApp features: - Create separate profiles for each family member - Document and overview febrile episodes and diseases over time - Document febrile seizures - Document symptoms, measures and medications - Super easy new medication scanning feature - A graph view of well-being and other details - Set reminders for temperature measurements - Receive helpful tips from “Dr. Fee” - Brief informative videos - Read about recent scientific articles and guidelines about fever - Find medication alternatives in Info library Important notes: - To use FeverApp you need a family code, which you can receive from the cooperating medical practices. Please contact us via www.feverapp.de . - FeverApp does not measure temperature. To measure temperature a separate thermometer is necessary. - Your input in the Feverapp helps Prof. David Martin and his team from the University Witten/Herdecke gain a deeper understanding of fever. The project is finantially supported by a grant from the the German Ministry of Education and Research Available languages: German, English and Russian

Screenshots

TK4 screens
FeverApp4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
TK versus FeverApp: the parameters behind the verdict, then further details
ParameterTKFeverApp
PriceFreeFree
Rating4.8 (1.2K ratings) — better—
Positive reviews72.4% of reviews—
Number of ratings1.2K — better—
Update frequencyEvery 2 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPod — better
Requires iOS18.011.0 — better
Further details — not scored
Size538 MB49 MB
Age rating12+12+
DeveloperTechniker Krankenkasse (TK)David Martin

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

FeverApp

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

TK

No in-app purchases

None

FeverApp

No in-app purchases

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.

Other comparisons