# ZoneSteady

> ZoneSteady (iPhone/iPad app by SLV Labs LLC.)

- Source: https://appshunter.io/ios/app/zonesteady/id6759931228 (this page in markdown: same URL + `.md`)
- Developer: [SLV Labs LLC](https://appshunter.io/developer/1877191305)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 50 MB
- Languages: English
- Released: 2026-03-16
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/zonesteady/id6759931228/reviews.md

## What is ZoneSteady?

ZoneSteady turns your Apple Watch into a powerful heart rate zone training tool — completely free, no subscription required.

* Apple Watch is required.

Start a workout on your Apple Watch and instantly see your real-time heart rate mirrored on your iPhone with a color-coded zone display. Whether you're warming up in Zone 1 or pushing your limits in Zone 5, ZoneSteady makes it effortless to train at the right intensity.


REAL-TIME HEART RATE ZONES
• Live heart rate streaming from Apple Watch to iPhone
• 5 color-coded training zones calculated using the Karvonen formula
• Full-screen zone display with bold, glanceable design
• Signal detection alerts you when heart rate data is lost


CUSTOMIZABLE ZONES
• Personalize your zone boundaries with Manual Override
• Adjust individual zone BPM thresholds to match your training plan
• Cascading logic ensures zones never overlap or leave gaps
• Percentages update in real-time as you fine-tune each zone
• Custom zones sync automatically to your Apple Watch
• Reset to scientifically-calculated defaults anytime


17 WORKOUT TYPES
• Running, cycling, swimming, hiking, strength training, HIIT, yoga, rowing, and more
• Start from your Watch or your iPhone — your choice

WORKOUT HISTORY
• Every session saved automatically with duration, calories, distance, and zone breakdown
• Visual zone timeline shows how your effort shifted throughout each workout
• Share workout summary cards with friends and training partners


BUILT FOR APPLE WATCH
• Native watchOS companion app with real-time zone display
• Works with Apple HealthKit for accurate, sensor-level heart rate data
• Landscape and portrait support on iPhone

100% FREE
• No subscription. No paywall. No trials.
• Professional-grade training tools available to everyone.


REQUIREMENTS
• Apple Watch Series 3 or later with watchOS 10+
• iPhone with iOS 17+
• Apple Health app with heart rate permissions enabled


## Version history (last 1 release)

### 1.0.7 — 2026-03-20

Added a Zone Stats page to the Apple Watch app. Swipe right during a workout to see how long you've spent in each zone, your live BPM, and session averages — all on your wrist.

Also expanded compatibility to watchOS 8+.

## More apps by SLV Labs LLC

- [Plant Playbook](https://appshunter.io/ios/app/plant-playbook/id6761553468)

All apps by SLV Labs LLC: https://appshunter.io/developer/1877191305

---

*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 2026-08-20.*