INRythm INR & Warfarin Tracker

Take control of your anticoagulant therapy.

INRythm is a simple, reliable tracker for everyone on long-term blood thinners — Warfarin, Coumadin, Sintrom, Marevan, Marcoumar, Jantoven, and other vitamin K antagonists (VKAs). Whether you've been prescribed long-term anticoagulants after a mechanical heart valve, atrial fibrillation (AFib), DVT, pulmonary embolism, or stroke prevention, INRythm gives you a clear, consistent record of your daily dose and INR results.

Built by a patient, for patients. I built INRythm after my own life-changing heart surgery left me on Sintrom for life. I needed something simple. So I made it.
Key features
• Dashboard — weekly dose summary, daily dose graph, INR results at a glance
• Daily dose logging — log and confirm every dose, never forget again
• INR tracking — record bloodwork results and watch trends over time
• Smart reminders — never miss a dose or a scheduled INR check
• Setup wizard — personalize for your medication, schedule, and target INR range
• Light & dark mode
• Offline cache — view and log even without internet

Privacy first. Your data is encrypted in transit, stored in your private account, and never sold to anyone. Delete it anytime from inside the app.
Live long and prosper.

Recent changes:
Built from your feedback — thank you to everyone who wrote in.
- Choose your medication: Sintrom, Warfarin, Marcoumar, Previscan or your own name, shown on your dashboard.
- Quarter-tablet doses: the stepper now moves in 0.25 mg steps.
- Week starts on Monday or Sunday — your choice in Settings.
- Fixed: calendar weekday labels were off by one day in the Americas, and CSV export filed evening doses under the next day.
Something to improve? Send feedback from Settings.