HRV tracker app for Apple Watch
HRV tracking that's finally readable.
Reps is a heart rate variability app that reads the HRV your Apple Watch already records and turns it into readable trends over time — so you can compare the signal with your recovery and training.
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 turns your Apple Watch HRV into readable trends over time, so instead of guessing whether today's reading is high or low, you can see where you sit against your own recent pattern.
There's nothing extra to wear and nothing extra to buy. Reps is built for the Apple Watch you already own — Series 6 or later. No chest strap, no second device, no new habit to build.
Built for Apple Watch
Follow your HRV trend with the Apple Watch you already own. No extra hardware and no new sensor to strap on.
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.
Recovery context
Compare your HRV trend with your Readiness Score, resting heart rate, and training history instead of treating one reading as a verdict.
Ask your own history
Ask Rex questions like "is my HRV normal for me lately?" and get an answer framed against your personal baseline.
From a number to a decision
Most HRV apps stop at the chart. Reps turns your readings into a trend against your own recent pattern, then lets you compare that trend with your Readiness Score, resting heart rate, and training history. The current Readiness Score is based on sleep, resting heart rate, and recent strain; HRV remains a separate trend so you can add context without pretending one noisy reading decides your day.
And when you want context rather than a headline, ask Rex "is my HRV normal for me lately?" The answer is framed against your personal baseline, not a generic population chart.
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.
Related reading
- HRV normal range by age — the real published reference figures, and why they overlap so heavily between decades.
- How to improve your HRV — the levers that genuinely move it, ranked, with how strong the evidence is behind each.
- Overtraining detection — what a suppressed HRV means when your load, Readiness and resting heart rate move with it.
Common questions
Do I need another sensor to track HRV with Reps?
No. Reps is built for the Apple Watch you already own, Series 6 or later, so there is no extra hardware and nothing new to wear.
What does Reps do with my HRV beyond showing a number?
Reps charts individual HRV readings as a trend against your own recent pattern. You can compare that separate context with your Readiness Score, resting heart rate, and training history; the current score itself uses sleep, resting heart rate, and recent strain.
Can I ask whether my HRV is normal for me?
Yes. Rex can answer questions like "is my HRV normal for me lately?" against your personal baseline rather than a generic population 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 • Built for iPhone + Apple Watch