Pill alerts wherever you go

Avoid bad ecstasy pills. Inform yourself about pill testing results and drug interactions and learn how to practice safer use.

Drug Checking Results

Avoid bad ecstasy pills

KnowDrugs informs you about pill testing / drug testing results and helps you to avoid particularly dangerous batches.

Substance Information

Understand how drugs work

Factsheets about more than 200 psychoactive substances: Learn about dosages, duration, side-effects and dangerous interactions.

Safer Use

Reduce risks through knowledge

Know how to spot a drug-related emergency and how to react when someone might need your help.

Consider how long you want to stay awake   Use your own straw to avoid the transmission of COVID-19, Influenca and Hepatitis B/C

Make sure you’re in a comfortable mindset   Watch each other and talk to your friends if you’re feeling unwell.

Emergency Help

Know how to react in emergency situations

Know how to spot a drug-related emergency and how to react when someone might need your help.


Find confidential advice nearby

Find accepting drug counselling and drug checking services nearby. No strings attached.

Everybody should have the right to know what’s inside their drugs. So that that they can make informed decisions.

Excellent knowledgeable app!

One of my favorite apps! Full of a lot of useful information on all sorts of recreational Drugs. I would recommend this app to anyone who uses whether it be ‘recreationally ‘or someone who uses daily..keep up the great work!!!

9 July 2022 on Apple App Store

True and honest information

This is honestly one of the best things to happen ever in a app. To the person who made this. YOURE SAVING LIVES. Having non bias true honest info readily available is truly just a amazing thing.

21 June 2021 on Google Play Store

One of the most useful and informative applications

Honestly i think this is one of the most useful and informative applications. (Of course it depends on the person, but for me it is) much love from Serbia ❤️

7 January 2020 on Google Play Store

Download the app and start making informed decisions!

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Frequently Asked Questions

What is drug checking?

Drug checking or pill testing is a way to reduce the harm from drug consumption by allowing users to find out the content and purity of substances that they intend to consume. 

This empowers users to make safer choices: to avoid more dangerous substances, to use smaller quantities, and to avoid dangerous combinations.

How does drug checking work?

People intending to take drugs provide a small sample to the testing service (often less than a single dose). Test results are usualy provided after a short waiting period.

Drug checking services use this time to discuss health risks and safe behaviour with the service users. The services also provide public health information about drug use, new psychoactive substance (NPS) and trends at a national level.

Where do the drug checking results come from?

The KnowDrugs app lists drug checking results from various harm-reduction organisations who conduct drug checking – e.g. Saferparty Zurich, CheckIt! Vienna or The Loop.

Some of the organisations publish the test results later on their websites which the KnowDrugs app aggregates in a reverse-chronological feed, so that the most recent test results always show up first.

Who is running KnowDrugs?

KnowDrugs is a self-started project by Philipp Kreicarek, a former Social Worker.

The goal of this project is to reduce the harms associated with the consumption of drugs by enabling people that decide to take drugs – despite the risks – to make informed decisions and to practice safer use.

This project is a 100% non-profit project and relies on donations in order to maintain and develop the app.


Is it safe to rely on drug checking results published on the internet/in the app?

No. There is no such thing as risk-free consumption of drugs.

Similar looking ecstasy pills can contain different ingredients and or strengths. Using drug checking services like Saferparty (Zurich), Checkit! (Vienna) or The Loop (UK) is highly recommended if you want to be sure, what your drug actually contains.

However, we believe that drug checking results should be accessible and available to those who do decide to take drugs. Drug checking results raise awareness about the fact that a high amount of ecstasy pills nowadays contain up to 4x the regular dose.

Support KnowDrugs

KnowDrugs is independent of governments. We believe that objective and unbiased information on drugs is a fundamental right. Please support the project with a donation, so that KnowDrugs can be developed further while staying independent.

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