Heart-rate-zone training
Find your
zone.
Every beat, in the right zone. Train toward a goal that actually counts the minutes that matter — and see how fast you recover.
The five zones
One number, five meanings.
Your zones come from your max heart rate (≈ 220 − age). Each one trains something different — and the app shows exactly which you're in.
Warm Up
Easy, conversational
Endurance
Comfortable, all-day pace
Aerobic
Working, but in control
Threshold
Hard, breathing heavy
Peak
All-out, seconds at a time
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.
Train with intent
Pick a goal. We'll point you at the right zone.
Your weekly target locks onto a single zone — so the minutes you bank are the ones that move you toward what you actually want.
Fat Loss
Zone 2Burn fat, keep muscle. Long, steady, low-intensity work.
Endurance
Zone 3Build aerobic capacity and a stamina base that lasts.
Performance
Zone 4Raise your threshold and tolerance for hard efforts.
Speed & VO₂max
Zone 5Sharpen top-end power with short, explosive intervals.
training zones, color-coded live
recovery measured after every session
goals, each mapped to one target zone
Stop guessing. Start training in the zone.
Free to download. Pair any Bluetooth strap and your first session is one tap away.