# Just Zones — Weekly heart rate zone minutes

> Weekly heart rate zone minutes (iPhone/iPad app by Guinea Pig Software Development Inc..)

- Source: https://appshunter.io/ios/app/just-zones/id6812169998 (this page in markdown: same URL + `.md`)
- Developer: [Guinea Pig Software Development Inc.](https://appshunter.io/developer/1895295065)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 12 MB
- Languages: American English
- Released: 2026-09-24
- Data updated: 2026-10-13

## What is Just Zones?

Just Zones turns the workouts you already record in Apple Health into an honest, weekly picture of time spent in each heart-rate zone.

WHAT IT DOES
• Week view: time in each zone this week, compared with last week and your usual (median of your last 4 weeks)
• Every workout, in full detail: heart-rate curve, minutes per zone, histogram, best sustained heart rate over rolling windows, and zone-change count
• Runs and rides with GPS: route map coloured by heart-rate zone, with auto splits
• Effort and recovery: elevated-effort intervals and recovery phases inferred from your heart-rate curve, for any workout type
• Strength, swimming and 50+ other workout types each get the detail HealthKit actually provides — the app tells you plainly when Apple Watch doesn't record something (e.g. reps or weight for strength workouts), instead of guessing
• Zone model shown, not hidden: uses Apple's own recorded zones when a workout has them, otherwise a clearly labelled heart-rate-reserve (Karvonen) estimate — with the exact BPM bounds and inputs always visible
• Manual zone settings: adjust max heart rate, resting heart rate, LTHR and age yourself if you don't want the app's estimate

TRENDS (PRO)
See your last 30 days of trends for free — weekly intensity mix, when you train, and more. Just Zones Pro extends Trends to your full history — one-time purchase, Family Sharing included, no subscription. Everything else in the app — Week, every workout at any age, and sharing a workout as an image — stays free, always.

PRIVACY
Just Zones reads workouts and heart-rate data from Apple Health — read-only, it never writes anything back. Your health data is processed and stored on your device. The app has no accounts and no backend of its own. It sends anonymous crash reports and handles purchases through third-party services; your health data is never included in either.

REQUIREMENTS
Requires an iPhone with workout and heart-rate data in Apple Health — recorded by Apple Watch, the Workout app, or another app that writes to Health. Just Zones does not record its own workouts and has no Apple Watch app.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Just Zones Pro | $9.99 | one-time |


## Is Just Zones safe?

Not enough ratings yet to assess Just Zones.

## Is Just Zones legit?

Just Zones appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Just Zones is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.2 — 2026-10-13

New in 1.2:
• iPhone Duo: two-column layouts on the inner display.
• 3D route relief, coloured by heart-rate zone.
• Route map at the top of every workout with a route.
• Place names beside workout dates.
• Swipe between workouts and days.
• Trends follow the selected period, with two new charts.
• Walking and more workout-type filters, with redesigned chips.
• Dates now include the year.
• Faster 3D and many fixes.

### 1.1 — 2026-09-29

The weekly chart now shows every day, including rest days. Day totals no longer overlap tall bars, and your weekly zone target line stays visible on lighter weeks.

### 1.0 — 2026-09-24

No release notes.

## More apps by Guinea Pig Software Development Inc.

- [Bouncer: Jump Rope Tracker](https://appshunter.io/ios/app/bouncer-jump-rope-tracker/id6763396174)
- [Nyamly: Calorie & Food Scanner](https://appshunter.io/ios/app/nyamly-calorie-and-food-scanner/id6806109078)

All apps by Guinea Pig Software Development Inc.: https://appshunter.io/developer/1895295065

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-13.*