iPhone · Apple Health

Your cardio week, clearly.

Just Zones turns your Apple Health workout heart-rate data into an honest, weekly time-in-zone picture — how much time you spent in each zone, and how it compares to last week.

Coming soon — not on the App Store yet

Z1 Recovery → Z5 Max, this week

Just Zones Week screen: time in each heart-rate zone this week

Peek inside.

Real screens from the app — week, workout detail, route by zone, and Pro.

Week screen with time-in-zone bars and comparison to last week — Week

Workout detail with heart-rate curve and minutes per zone — Workout detail

Route map coloured by heart-rate zone with auto splits — Route by zone

Settings screen: HealthKit only, all data stays on this device — Privacy settings

Unlock Just Zones Pro: one-time purchase, nine ninety nine, Family Sharing included — Pro, once

Four things it does. Nothing it doesn't.

Zones per workout

Every workout, every zone — a heart-rate-reserve estimate with zone bounds shown, and manual max/resting HR settings.

Trends by period

Week, month, or your full history — how your time-in-zone shifts over weeks, not just one workout.

Route map by zone

Runs and rides with GPS get their route coloured by heart-rate zone, with auto splits per kilometre.

Privacy by default

Health data stays on your device. No accounts, no analytics — only crash reports and purchase handling ever leave the phone.

Free is generous. Pro is one thing.

Free

Week screen, any week
Every workout, full detail, any age
Full zone setup, share as image
Trends sampler — last 30 days

Pro

Trends over your full history — weekly & monthly, week vs week

$9.99 once

One-time purchase, no subscription. Family Sharing included.