HRV tracker app for Apple Watch
Read the rhythm your watch already sees.
Reps is a heart rate variability app that reads the HRV your Apple Watch already records and turns it into readable trends over time — then folds it into a single daily readiness verdict you can act on.
Free to try · Apple Watch Series 6+
Your HRV, finally readable
Your Apple Watch already records heart rate variability. Reps makes it mean something.
HRV is one of the most honest signals your body gives off, but on its own it's just a jagged number that shifts every day. Reps reads the heart rate variability your Apple Watch already logs through Apple Health and turns it into readable trends over time — so instead of guessing whether today's reading is high or low, you can see where you actually sit against your own recent pattern.
There's nothing extra to wear and nothing extra to buy. Reps uses the Apple Watch you already own — Series 6 or later — and reads what it's already recording. No chest strap, no second device, no new habit to build. The watch keeps doing its job; Reps does the reading.
Straight from Apple Health
Reps reads the HRV your Apple Watch already records through Apple Health. No extra hardware, no new sensor to strap on — just the watch you own.
Trends, not noise
A single reading swings day to day. Reps turns your HRV into readable trends over time, so you can see the direction instead of chasing one number.
Feeds your readiness
HRV joins sleep and training load in a single daily Readiness Score with a plain-English verdict — so the signal actually changes your day.
Ask your own history
Rex, the AI coach, answers questions like "is my HRV normal for me lately?" from your own history — on-device where supported.
From a number to a decision
Most HRV apps stop at the chart. Reps doesn't. Your heart rate variability is one of the signals — alongside sleep and training load — that Reps rolls into a single daily Readiness Score with a plain-English verdict. That means HRV isn't just observed on a graph; a falling HRV actually changes whether today reads as a push day or a rest day. You get one clear call for the morning instead of three separate metrics to interpret yourself.
And when you want context rather than a headline, Rex — the on-device AI coach where supported — can reason over your own history. Ask "is my HRV normal for me lately?" and the answer is framed against your personal baseline, not a generic population chart. It's the difference between a heart rate variability app that shows you data and one that helps you decide what to do with it.
Reps is a tracking and coaching aid, not a medical device. It doesn't diagnose conditions or replace reading your own body's signals with professional medical advice.
Common questions
Where does Reps get my HRV data?
From Apple Health. Your Apple Watch already records heart rate variability in the background, and Reps reads those readings and turns them into trends over time. There's no extra hardware and nothing new to wear — Reps uses the Apple Watch you already own, Series 6 or later.
What does Reps do with my HRV beyond showing a number?
HRV is one of the signals — alongside sleep and training load — that Reps rolls into a single daily Readiness Score with a plain-English verdict. So a falling HRV doesn't just sit on a chart; it can change whether today reads as a push day or a rest day.
Can I ask whether my HRV is normal for me?
Yes. Rex, the AI coach — running on-device where supported — can answer questions like "is my HRV normal for me lately?" using your own history, so the answer is framed against your personal baseline rather than a generic chart.
Is Reps a medical device?
No. Reps is a tracking and coaching aid, not a medical device, and it doesn't diagnose conditions or replace professional medical advice. It helps you read and understand the HRV trends your Apple Watch already records.
HRV tracker app for Apple Watch
Know what your heart is telling you.
Read the HRV your Apple Watch already records — and let it shape your day. Free to try.
Free to download • Syncs with Apple Health