Features
Everything you need to train by heart rate.
The whole app is built around one idea: spend your time in the zone that matches your goal — and know it while you're doing it.
Live zone gauge
Watch your heart rate move through five color-coded zones in real time. One glance tells you whether to push or back off.
A goal that counts what matters
Pick a training goal and your weekly target locks onto one zone. Minutes only count when you're training where it actually moves the needle.
Recovery score
After every session we measure how far your heart rate drops in 60 seconds — a simple read on how fit and how recovered you are.
Works with your strap
Pair any Bluetooth heart-rate strap — Polar, Wahoo, Garmin, Scosche. On iPhone, import past sessions straight from Apple Health.
01
Live workout
- A 270° gauge shows your current zone the instant your heart rate changes.
- Color, number, and a clear label — no decoding required mid-effort.
- Calories estimated from your heart rate, weight, and time.
02
Goal-based weekly target
- Choose Fat Loss, Endurance, Performance, or Speed.
- Your target zone is set automatically and your ring counts time in it.
- Every other zone is still tracked, just not counted.
03
Heart-rate recovery
- A 60-second measurement runs right after you finish.
- See your drop in beats and a plain-language rating.
- Watch the trend climb as you get fitter.
04
Sensors & history
- Pair any Bluetooth heart-rate strap in seconds.
- Import past workouts from Apple Health on iPhone.
- Insights, streaks, and a month calendar keep the long view.
Stop guessing. Start training in the zone.
Free to download. Pair any Bluetooth strap and your first session is one tap away.