# ZoneSteady: Heart Rate Zones — Heart Rate & Hybrid Workouts

> Apple Watch heart rate zone training tool for iPhone, free. (iPhone/iPad app by SLV Labs LLC.)

- Source: https://appshunter.io/ios/app/zonesteady-heart-rate-zones/id6759931228 (this page in markdown: same URL + `.md`)
- Developer: [SLV Labs LLC](https://appshunter.io/developer/1877191305)
- Category: Health & Fitness
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 62 MB
- Languages: American English
- Released: 2026-03-16
- Data updated: 2026-09-19
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/zonesteady-heart-rate-zones/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

## Key features

- Real-time heart rate streaming
- Color-coded training zones
- Customizable zone boundaries
- 17 workout types supported
- Workout history tracking
- Native Apple Watch app

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/zonesteady-heart-rate-zones/id6759931228/reviews.md

### 5/5 — Great for Hyrox Training

*2026-08-14*

I used to wear a heart rate monitor but would always forget to put it on before I went to the gym. I always wear my Apple Watch so this app was super helpful when I didn’t have my heart rate monitor that I would wear. It was so good I ended up ditching my wearable monitor and just using this app instead. I love how I can simply look down at my watch and phone and know what zone I was in based on the color.

### 5/5 — ZoneSteady is a must have!

*2026-05-09*

ZoneSteady has been an excellent tool for helping me stay focused and consistent with heart rate zone training. The app is easy to use, accurate, and makes tracking workouts simple and motivating. I especially like how clearly it displays heart rate zones during training, helping me stay on target and improve performance without overtraining. Whether you’re a beginner or an experienced athlete, I highly recommend ZoneSteady to anyone serious about endurance, fitness, or structured training.

## Frequently asked questions about ZoneSteady

### Does ZoneSteady have ads?

Yes, ZoneSteady contains advertisements. The app is free to use and provides professional-grade training tools without a subscription.

### What devices is ZoneSteady compatible with?

ZoneSteady requires an Apple Watch Series 3 or later with watchOS 10+ and an iPhone with iOS 17+. It also integrates with the Apple Health app.

### How does ZoneSteady calculate heart rate zones?

ZoneSteady uses the Karvonen formula to calculate 5 color-coded training zones. Users can also manually override and personalize zone boundaries with custom BPM thresholds.

### Can I start workouts from my iPhone with ZoneSteady?

Yes, you can start workouts directly from your iPhone or your Apple Watch. The app supports 17 different workout types, including running, cycling, and HIIT.

### What information is saved in my workout history?

Every workout session is automatically saved with details on duration, calories burned, distance, and a breakdown of time spent in each heart rate zone. A visual timeline shows your effort throughout the session.

### Is ZoneSteady completely free to use?

Yes, ZoneSteady is 100% free. There are no subscriptions, paywalls, or trial periods required to access its professional-grade training tools.

### How often is ZoneSteady updated?

The latest version of ZoneSteady is 1.1.2, and it was last updated on September 14, 2026. Updates typically include new features, bug fixes, and performance improvements.

### What is the age rating for ZoneSteady?

ZoneSteady has an age rating of 4+. This indicates it is suitable for users of all ages, with no content restrictions.

## Version history (last 5 releases)

### 1.1.2 — 2026-09-14

### What’s New in Version 1.1.2

- **Customize race simulations:** Edit Full Race Sim and Half Sim before starting—change run distances, swap HYROX or DEKA FIT stations, and add, remove, or reorder legs without changing the original presets.
- **Clearer workout controls:** Hybrid Race and Custom Workout buttons now show exactly what comes next, such as “End Run 1” and “Start Ski Erg,” in portrait and landscape.
- **More reliable Apple Watch connections:** Improved workout startup, automatic connection after opening the Watch app, and back-to-back workout handling.
- **Better workout synchronization:** Improved phone/Watch timing and recovery from delayed connections, keeping the correct Hybrid controls visible.
- **Startup and cancellation fixes:** Connection waiting time is excluded from workout duration, and cancelled starts won’t unexpectedly launch later.

### 1.1.1 — 2026-09-12

Minor bug fixes

### 1.1.0 — 2026-09-10

ZoneSteady’s biggest workout update yet:

• Go ad-free with the optional ZoneSteady Supporter annual subscription. Every workout feature remains free for everyone.

• Try Free Hybrid workouts and switch freely between running and exercise during one continuous session.

• Take on Hybrid Race workouts with structured runs, stations, transitions, splits, and detailed results.

• Create your own custom workouts and follow them from your Apple Watch.

We’ve also improved workout summaries, History details, and overall reliability.

### 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+.

### 1.0.6 — 2026-03-19

Smarter workout picker — The workout list on your Apple Watch now learns from your habits. Your most-used workouts automatically rise to the top, so you spend less time scrolling and more time training.

Improved workout saving — Multiple consecutive workouts done entirely from your Apple Watch now all save correctly to your history, even when your phone stays in your pocket the whole time.

## Apps similar to ZoneSteady

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Endeavor Health Fitness](https://appshunter.io/ios/app/endeavor-health-fitness/id6758885458) | 5.0 (2) | Free | Health & Fitness |
| [Synergy Fitness for Her](https://appshunter.io/ios/app/synergy-fitness-for-her/id1495088949) | — | Free | Health & Fitness |

## 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

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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 2026-09-19.*