# KnowDrugs Drug Checking vs TK

The clearest difference is rating: KnowDrugs Drug Checking at 4.7 against TK's 1.4. KnowDrugs Drug Checking also leads on review sentiment (88% vs 64%) and update cadence (fortnightly vs every 5 weeks). TK's advantage is in-app purchases (none vs 1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. KnowDrugs Drug Checking sells 1 one-off in-app purchase. TK asks for nothing beyond the download.

KnowDrugs Drug Checking holds the better App Store score, 4.7 against 1.4. Both are backed by a comparable volume of ratings — 38 and 15 respectively. Written reviews point the same way: 88% of KnowDrugs Drug Checking's written reviews are positive against 64% of TK's.

KnowDrugs Drug Checking ships an update fortnightly, TK every 5 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | KnowDrugs Drug Checking | TK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (38 ratings)](https://appshunter.io/ios/app/knowdrugs-drug-checking/id1152858301/reviews)** | [1.4 (15 ratings)](https://appshunter.io/ios/app/tk-ident/id6468877043/reviews) |
| Number of ratings | **38** | 15 |
| Positive reviews | **87.8% of reviews** | 64.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 86 MB | 192 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Plant Product Design UG (haftungsbeschraenkt)](https://appshunter.io/developer/1152858300) | [Techniker Krankenkasse (TK)](https://appshunter.io/developer/355493231) |

## What reviewers say

### KnowDrugs Drug Checking

[App page](https://appshunter.io/ios/app/knowdrugs-drug-checking/id1152858301)

Access drug testing results, pill warnings, and drug alerts. Provides information on over 200 substances, harm reduction advice, and strategies for safer use. Helps users make informed decisions to minimize potential risks.

**Highlights:** Drug testing results lookup, Pill warnings and alerts, Information on 200+ drugs, Harm reduction advice, Safer drug use strategies, Emergency response guidance

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Custom Theme | $2.99 | one-time |


### TK

[App page](https://appshunter.io/ios/app/tk-ident/id6468877043)

This app allows secure access to digital health services using your health insurance ID. It enables login to various health applications, manages registered devices, and handles consent settings for your health data.

**Highlights:** Create and use personal health ID, Login to digital health applications, Manage registered devices, Manage consents and authorizations, Secure identification via ID card or health card

**In-app purchases:** none


## Frequently asked questions

### Is KnowDrugs Drug Checking free?

KnowDrugs Drug Checking is free to download, with in-app purchases available.

### Is TK free?

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

### Which has better reviews, KnowDrugs Drug Checking or TK?

KnowDrugs Drug Checking is rated higher. KnowDrugs Drug Checking averages 4.7 out of 5 from 38 ratings, while TK averages 1.4 from 15 ratings.

### Do KnowDrugs Drug Checking or TK have ads?

Neither KnowDrugs Drug Checking nor TK shows ads.

### Which is updated more often, KnowDrugs Drug Checking or TK?

KnowDrugs Drug Checking ships an update fortnightly, and TK every 5 weeks. Most recently, KnowDrugs Drug Checking was updated on November 2, 2026 and TK on November 7, 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.*