A new ECG.
Every day.
Interpret a 12-lead ECG and pick the correct diagnosis. Don't break your streak.
Next puzzle in
@thedailyecg↑ Live preview — see how the daily puzzle plays out
2 tries, 1 clue
A wrong first answer reveals a clinical clue to help you reason through it.
Build your streak
Solve every day. Miss a day or get both tries wrong, and your streak resets.
Climb the leaderboard
Compete on longest streak and accuracy with players worldwide.
How to play
- 1. Look at today's 12-lead ECG.
- 2. Pick the correct diagnosis from 4 options.
- 3. If wrong, you get a clue and one more try.
- 4. Acing it on the first try is the dream. Miss both and your streak ends.
- 5. Come back tomorrow for a new ECG.
What is The Daily ECG?
The Daily ECG is a free, daily 12-lead ECG interpretation game inspired by Wordle. Every day at midnight Lisbon time, a new electrocardiogram appears. You have two attempts to pick the correct diagnosis from four plausible options.
It's built for medical students preparing for exams, residents sharpening pattern recognition, emergency physicians staying current, and anyone curious about how the heart's electrical activity reveals disease. The puzzles span sinus arrhythmias, atrioventricular blocks, bundle branch blocks, ST-elevation myocardial infarction (STEMI), Wellens syndrome, Wolff-Parkinson-White, atrial fibrillation, ventricular tachycardia and many other patterns.
Want a refresher before playing? Browse the ECG reference library →
Frequently asked questions
Is The Daily ECG free?+
Yes, completely free. No ads, no paywalls. Create an account to track your streak and stats.
Who is it for?+
Medical students, residents, physicians (especially emergency, internal medicine, cardiology, anesthesiology), nurses, paramedics — anyone who reads ECGs or wants to learn.
When does the new ECG appear?+
Every day at midnight Europe/Lisbon time. The same ECG is shown to everyone worldwide on the same day, so you can compare scores fairly.
How many tries do I get?+
Two. The first guess is unscored if wrong — you get a clue and one more attempt. Solving on the first try gives you the maximum score and keeps your streak alive.
Can I see past ECGs?+
Yes — registered users can browse the full archive of past puzzles to review and practice diagnoses they missed.
Where do the ECGs come from?+
Each ECG is curated to teach a specific clinical pattern. They are gathered from highly professional and well-recognised medical platforms, namely Life in the Fast Lane. Diagnoses include the most clinically important arrhythmias, conduction abnormalities, ischemic patterns, and morphological findings.