INR Diary tracks your oral anticoagulation therapy

  • Configure a repeating dose scheme
  • Get reminded of your daily dose at a specified time
  • Visualise your INR level over time



Be reminded to take your anticoagulation medicine!

All anticoagulents

Whether you're using Warfarin, Marcoumar, Sintrom, ...

INR graph

Review the fluctuation of your INR level over time.

Export your data

Make a backup for yourself or to keep your therapist posted.

Story behind the app

In September 2014, my 30-year-old wife underwent surgery for a mechanical cardiac valve because hers was wearing out. As a result, she suddenly had to take blood thinners every day. The dose to be taken daily often varies from day to day. It also happens that she doubts whether she has taken the medication. This is of course very dangerous.

Around the same time, I was looking for an interesting case for my first Android app. With my wife as a guinea pig, a first version was created. INR Diary was born!

Today, INR Diary is the best rated INR management app for Android. It is available in 6 languages: English, German, Spanish, French, Italian and Dutch. INR Diary has been downloaded over 3500 times in over 30 countries throughout the world.

In the end of 2020, the app got a complete overhaul and is now also available on iOS.

Peter Mesotten


Sandra Ramaekers

QA / Support

What do people think?

Exactly what I need as a blood thinner patient. Real value for money. Thank you for this app!

Peter K Germany

I own the app for a few weeks now and I've come to the conclusion that it contains exactly what you need as a blood thinner patient.

Arthur Fricker Germany

INR Diary is very user friendly. Great to see that the app is translated into German. Fair price.

Meinolf Hepp Germany

I'm a Marcoumar patient who's been using this app for quite a while now. INR Diary is the best out of all apps I've tried and definitely worth the money.

Wolfgang Starrost Germany

This app really contains everything you would expect. Nice that you can configure an INR range. Well done!

Erik Venema The Netherlands

It's a great app. The landing page is super nice and clean. Perfect for my needs.

Stephanie Duke Canada

Great app! Clear, easy to use, possibility to individually configure a daily dose, ... Has everything a Marcumar patient needs. Many thanks to the developer, great work! Makes the life of a Marcumar patient a lot easier...

Sebastian H. Germany

Finally an app for Marcoumar patients, which leaves almost nothing to be desired.

Juergen Ahlers Germany

I've switched to this app after having used a competitor INR app for years. The ability to add doses in bulk is a great help.

Ola Thoresen Norway

Very good app, easy and understandable. Nice notification sound.

Petra Welcker Germany

Perfect balance between features and complexity, does precisely what it should.

Hans Nygaard Denmark

This app is value for your money. Quick and easy to set up. A real help for us, Marcumar patients.

Stephan Winkler Germany

Contact us

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