Heart health app
Your heart data, decoded.
Your Apple Watch already collects a stream of heart data. Reps turns it into something you can read — resting heart rate trends, a fitness age, and cardio recovery signals — from the watch you already wear.
Free to try · No extra hardware
The numbers your watch collects, finally readable
A watch full of heart data is only useful if you can see what it means.
Reps reads the heart signals your Apple Watch already logs to Apple Health — resting heart rate, heart rate variability, and cardio-fitness data — and turns them into clear trends over time. Instead of a wall of daily numbers, you see the direction: is your resting heart rate drifting down as your training pays off, or creeping up because you're run down?
On top of the trends, Reps gives you a fitness age — a single number built from your VO2 max and heart data that tells you how your cardio fitness stacks up against your years, with insight into what's moving it. It's the kind of read that usually lives buried in a health app, brought forward and made to mean something.
Resting heart rate trends
Watch the line that quietly tracks your fitness and your recovery — down when you're adapting, up when you're overreaching.
Fitness age
A single number from VO2 max and heart data, with what-moves-it insight, so cardio fitness stops being abstract.
HRV as a recovery signal
Your heart rate variability feeds the daily Readiness Score, so heart data isn't just observed — it's acted on.
No extra device
Everything comes from the Apple Watch you already own. Nothing to buy, nothing to charge on the side.
Heart data that actually changes your day
Most heart trackers stop at showing you a chart. Reps uses the same signals as inputs to a daily Readiness Score and training windows, so a dropping HRV doesn't just get logged — it changes whether today is a push day or a rest day. And Rex, the on-device-where-supported AI coach, can answer "is my resting heart rate normal for me lately?" from your own history.
Reps is not a medical device. The ECG feature lives on your Apple Watch and in Apple Health; Reps decodes everyday heart metrics and does not diagnose conditions. See a clinician for medical concerns.
Common questions
What heart metrics does Reps show?
Reps reads the heart data your Apple Watch already records through Apple Health — resting heart rate, heart rate variability, and cardio-fitness signals — and turns them into readable trends plus a fitness-age estimate.
Does Reps take an ECG?
No. The ECG feature belongs to your Apple Watch and the Apple Health app. Reps focuses on decoding the everyday heart metrics your watch collects — resting heart rate, HRV, and cardio fitness — into trends and recovery signals.
What is fitness age?
Fitness age is a single number that summarizes your cardio fitness relative to your years, built from VO2 max and heart data, with insights into what moves it up or down.
Is Reps a medical device?
No. Reps surfaces trends to help you understand your training and recovery. It is not a medical device and does not diagnose heart conditions — see a clinician for medical concerns.
Heart health app
Understand your heart, every day.
Trends, fitness age, and recovery signals from the watch on your wrist. Free to try.
Free to download • Syncs with Apple Health