# Simple Zones — Heart Rate Training Simplified

> Real-time heart rate zone training for optimized workout performance. (iPhone/iPad app by Bred Ventures Inc.)

- Source: https://appshunter.io/ios/app/simple-zones/id1533922808 (this page in markdown: same URL + `.md`)
- Developer: [Bred Ventures Inc](https://appshunter.io/developer/897222461)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Rating: 4.00/5 from 49 App Store ratings · 30 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.4 · 17 MB
- Languages: American English, Canadian French, German (Germany), Italian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China), Latin American Spanish and 1 more
- Released: 2021-04-17
- Data updated: 2026-08-14
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/simple-zones/id1533922808/reviews.md

## What is Simple Zones?

SWEAT SMARTER WITH HEART RATE ZONE TRAINING FOR A BETTER, STRONGER YOU!

Visualize how hard you’re working with REAL-TIME ZONE TRAINING using your Apple Watch or connected Bluetooth Heart Rate Monitor

No matter your workout activity, you can use Zone Training to get instant feedback on your performance and start crushing your fitness goals. 

With just a quick glance at the eye-catching zones on your phone or wrist during your workout, you’ll know whether you should pump the brakes on the intensity or crank it up a notch. 

We use your beats per minute (bpm) and percent of max heart rate to show you which zone you’re in, so you can take the guesswork out of your fitness routine and start maximizing your results today. 

The Zones App has five branded zone models to choose from, inspired by some of your favorite fitness brands:

• Peloton*
• NordicTrack* (also supports iFit ActivePulse*!)
• Echelon
• Orange Zones
• Heart Health**

* Peloton, NordicTrack, ActivePulse, and Echelon are trademarks owned by those respective companies. 

** Inspired by the American Heart Association exercise & fitness guidelines for maintaining a Healthy Heart.

BENEFITS OF HEART RATE ZONE TRAINING
- Reduced Risk of Fatigue & Overtraining
- Better, More Restorative Recovery
- Maximum Fat Burn and Weight Loss
- Increased Speed and Endurance
- Enhanced Performance

PRIVACY
We value your privacy and never share or sell any user information.

APPLE HEALTH INTEGRATION
- We read Heart Rate from your Apple Watch via Apple Health
- We (optionally) save your workout data to Apple Health
- All workouts count towards your Apple activity rings
- Sync workouts to Strava, TrainingPeaks, or your favorite workout app through Apple Health importing

APPLE WATCH REQUIREMENTS 
The minimum requirement for the Apple Watch is a series 3 or later. 

BLUETOOTH HEART RATE MONITOR SUPPORT
Connect any standard Bluetooth heart rate monitor, armband, or chest strap. Use your OTBeat, Polar, Wahoo, or Garmin HRM. 

Terms of Service: https://www.workoutcompanions.app/terms-of-use
Privacy Policy: https://www.workoutcompanions.app/privacy-policy

## Key features

- Real-time heart rate zone visualization
- Apple Watch and Bluetooth HRM support
- Customizable zone models
- Apple Health integration
- Workout data syncing
- Activity ring tracking

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Zones Pro | $9.99 | one-time |
| Zones Pro | $4.99 | one-time |


## Recent user reviews (10 of 30)

All indexed reviews: https://appshunter.io/ios/app/simple-zones/id1533922808/reviews.md

### 2/5 — Got bug still broke

*2026-08-03*

I use polar h10 chest strap with simple zones app for indoor bike workouts. The app recognizes and connects to the chest strap and tracks my heart rate fine. The problem is with workout calories. It won’t show calories on screen during a workout even tho I have that toggled on in settings but it somehow does record calories in apple health app when I finish my workout.

### 1/5 — Not sure about kcal accuracy

*2026-05-08, version 5.5.2*

I do strength training and cardio. For cardio I use bowflex bike withe stupid jrny app from bowflex. It lists all the stats for the ride but doesn’t connect to my apple watch to be able to show heart rate during ride. I do heart rate zone training so needed something that would show on my iPhone. They suggested I buy I chest strap monitor but the polar h10 one I decided was best is like $100. So I decided to try to find some heart rate app that would work with apple watch first and found this app. 
I bought it and tried it out starting both this app and the jrny app at same time then riding for 45mins. This app seemed to work fine for heart rate but I noticed calories didn’t match on both apps. Like it was even close. This app showed much less calories burned than the jrny app. So not sure I’m gonna stick with the app or not since idl which app is correct kcal number.

### 5/5 — Found my app

*2025-10-22*

Tried a bunch of heart rate zone training apps, this is the one. I can’t believe I’m actually writing a review for this lol. (I never write reviews)

### 3/5 — Good App One Big Flaw

*2025-10-20*

Overall a good app for heart rate zone training, however it does provide distance on display.

### 3/5 — Custom zones not working

*2025-08-17, version 5.5.2*

You cannot customize the Zones as you want or as you medical lab defines them e.g. ZONE two 110 to 135.  Sad.

### 5/5 — Zones are great

*2025-07-01*

Zones are a neat way to display you’re workout burn and other important variables. Thank you for creating useful products

**Developer response:** Thank you for the kind comments and for using the Zones app. We love user feedback, let us know how we can improve the app! support@pkfitness.com

### 1/5 — SCAM

*2025-04-29*

Paid for the pro version just for it to display 130bpm no matter what the actual HR Monitor says.

**Developer response:** Sorry you are having trouble. It sounds like you may not have the necessary permissions enabled for the app to read your heart rate from the app. Reach out to us at support@pkfitness.com for help.

### 5/5 — Essential if you need reading glasses and even if you don’t

*2025-03-28*

I bought a Polar H10 to monitor live my HR. Great on a treadmill where I could display my HR on a console, but not outdoors: to see my HR without buying an expensive additional dedicated wrist display I need to stop, don reading glasses, and navigate several screens on my Apple Watch. Very inconvenient if you are training intensively. Enters Zones with its LARGE HR display, that stays on for the duration. I need only to lift my wrist to see it. Problem solved.

**Developer response:** Thank you for the review! We love user feedback, let us know how we can improve the app. support@pkfitness.com

### 5/5 — The simplest yet most effective and accurate!

*2024-08-18*

After trying at least eight different apps to measure heartbeat and zones in my Apple Watch I settled with this one as the best by far. I use other things like a Whoop to track my fitness so all I wanted is an app that displays in big letters on the watch  the heart zone and the heartbeat. All you need is 2  taps no complications no sweat great accuracy and works with external Sensors!  The heart rate is displayed really fast no waiting time like the native Apple Watch heart.

**Developer response:** We appreciate the review! We love user feedback, let us know how we can improve! support@pkfitness.com

### 1/5 — Better Apps

*2024-05-23*

This app does not notify you when you are out of Zone, and does not give you an overall summary of the activity. I bought the app and will get use out of it. Just understand there is no trial because they the developer knows it falls short

**Developer response:** We appreciate your feedback. The Zones app writes workout information to Apple Health, it is intended to be used in conjunction with the Apple Fitness app that provides the workout summary and details. 

The Zones app does have the ability to set a Low and High Alert range to be notified when you are below and above the set numbers. Are you looking for a notification for when you go in and out of each zone? Would you want this as a haptic vibration or a visual indication? 

With regard to the 'no trial' comment, our app can be used on workout for up to 20 minutes in length. The Pro version is provided for users that wish to utilize the app for workouts longer than 20 minutes. 

If you are not satisfied with the App, reach out to us at support@pkfitness.com and we can help you get a refund for your purhcase.

## Frequently asked questions about Simple Zones

### What does the Zones Training app do?

This app provides real-time heart rate zone training to help you optimize your workout intensity. It visualizes your effort based on your heart rate, allowing you to adjust your pace to maximize results, improve recovery, and reduce the risk of overtraining.

### What are the key features of this heart rate tracker?

Key features include real-time heart rate zone visualization, support for Apple Watch and standard Bluetooth heart rate monitors, integration with Apple Health to save workout data and sync to other apps like Strava, and the ability to choose from five different branded zone models.

### How much does the Zones Training app cost?

The app is free to download and use, but it offers in-app purchases for additional features or content. Specific pricing for these in-app purchases can be found within the app itself.

### What devices are compatible with Zones Training?

The app is compatible with Apple Watch Series 3 or later. It also supports any standard Bluetooth heart rate monitor, including popular brands like Polar, Wahoo, and Garmin.

### Who would benefit from using this app?

This app is ideal for anyone engaged in physical activity who wants to train more effectively. This includes runners, cyclists, and gym-goers looking to improve endurance, burn fat, enhance performance, or simply ensure they are working out at the optimal intensity for their goals.

## Version history (last 5 releases)

### 6.0.6 — 2026-05-15

UI enhancements and stability improvements

### 5.5.2 — 2025-05-22

Fixed a crashing bug on launch.

### 5.5.1 — 2024-05-18

Bug fixes and performance improvements.

### 5.5.0 — 2024-05-14

Fixed a bug preventing HR range boundary warnings.

### 5.4.4 — 2023-12-12

Added support for promotions.

## Apps similar to Simple Zones

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Echo: Watch Heart Rate Monitor](https://appshunter.io/ios/app/echo-watch-heart-rate-monitor/id1494679144) | 4.4 (3,650) | Free | Health & Fitness |
| [Cardiio: Heart Rate Monitor](https://appshunter.io/ios/app/cardiio-heart-rate-monitor/id542891434) | 4.7 (58,416) | Free | Health & Fitness |
| [CardioBot: Heart Rate Monitor](https://appshunter.io/ios/app/cardiobot-heart-rate-monitor/id1149412984) | 4.5 (9,944) | Free | Health & Fitness |
| [Cardiogram: Heart & BP Logger](https://appshunter.io/ios/app/cardiogram-heart-and-bp-logger/id1000017994) | 4.6 (13,372) | Free | Health & Fitness |
| [Heart Rate Plus: Pulse Monitor](https://appshunter.io/ios/app/heart-rate-plus-pulse-monitor/id1061544495) | 4.5 (3,385) | Free | Health & Fitness |
| [Instant Heart Rate: HR Monitor](https://appshunter.io/ios/app/instant-heart-rate-hr-monitor/id409625068) | 4.9 (228,890) | Free | Health & Fitness |

## More apps by Bred Ventures Inc

- [Orange Zones Workout Companion](https://appshunter.io/ios/app/orange-zones-workout-companion/id1482990976)
- [Cycling Workout Companion](https://appshunter.io/ios/app/cycling-workout-companion/id1484132475)
- [Heart Health Zone Training](https://appshunter.io/ios/app/heart-health-zone-training/id1484132685)
- [Cross Fit Zone Training](https://appshunter.io/ios/app/cross-fit-zone-training/id1484132891)
- [Training Workout Companion](https://appshunter.io/ios/app/training-workout-companion/id1484133808)
- [Fit Body Workout Companion®](https://appshunter.io/ios/app/fit-body-workout-companion/id1484136211)

All apps by Bred Ventures Inc: https://appshunter.io/developer/897222461

## Related topics

[zones for training](https://appshunter.io/ios/topics/zones-for-training)

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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 2026-08-14.*