# TK vs ImpfPassDE

The clearest difference is in-app purchases: TK at none against ImpfPassDE's 2. ImpfPassDE's advantage is rating (4.7 vs 4.3) and review sentiment (93% vs 81%). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ImpfPassDE sells 2 in-app purchases, starting at $0.99 per month. TK asks for nothing beyond the download.

ImpfPassDE holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: ImpfPassDE has 179 ratings behind it against 22, so its average is the more settled of the two. Written reviews point the same way: 81% of TK's written reviews are positive against 93% of ImpfPassDE's.

TK ships an update monthly, ImpfPassDE every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | TK | ImpfPassDE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (22 ratings)](https://appshunter.io/ios/app/tk-doc/id1435903815/reviews) | **[4.7 (179 ratings)](https://appshunter.io/ios/app/impfpassde/id1472717242/reviews)** |
| Number of ratings | 22 | **179** |
| Positive reviews | 81.0% of reviews | **92.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 44 MB | 54 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) | [GZIM - Gesellschaft zur Förderung der Impfmedizin mbH](https://appshunter.io/developer/1472717241) |

## What reviewers say

### TK

[App page](https://appshunter.io/ios/app/tk-doc/id1435903815)

Access medical consultations, advice, and appointment scheduling all in one place. Get quick information on symptoms, lab results, and medical abbreviations. Find doctors and receive expert dental advice.

**Highlights:** Video consultations with doctors, 24/7 medical advice via chat or phone, Appointment scheduling, Symptom checker, Lab value checker, ICD code search, Dental prosthesis advice

**In-app purchases:** none


### ImpfPassDE

[App page](https://appshunter.io/ios/app/impfpassde/id1472717242)

Manage your vaccination records digitally, access up-to-date recommendations, and share your pass with healthcare providers. Track your vaccination status and receive timely reminders for upcoming immunizations.

**Highlights:** Digital vaccination record management, Up-to-date vaccination recommendations, Secure data exchange with doctor's offices, Family profiles for multiple users, Travel vaccination tracking, Vaccination reminders, PDF export of vaccination pass

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ImpfPassDE Plus ABO pro Monat | $0.99 | per month |
| ImpfPassDE Plus einmalig | $22.99 | one-time |


## Frequently asked questions

### Is TK free?

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

### Is ImpfPassDE free?

ImpfPassDE is free to download, with in-app purchases available.

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

ImpfPassDE is rated higher. TK averages 4.3 out of 5 from 22 ratings, while ImpfPassDE averages 4.7 from 179 ratings.

### Do TK or ImpfPassDE have ads?

Neither TK nor ImpfPassDE shows ads.

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

TK ships an update monthly, and ImpfPassDE every 2 months. Most recently, TK was updated on November 2, 2026 and ImpfPassDE on November 3, 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.*