Simple Zones

Simple Zones

Heart Rate Workout Tracker

48 ratings
29 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • April 17, 2021
  • May 15, 2026
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About

Track your workouts in real-time using heart rate zone training. Get instant feedback on your performance to optimize intensity and achieve your fitness goals. Supports Apple Watch and Bluetooth heart rate monitors.

Real-time heart rate zone visualization
Apple Watch and Bluetooth HRM support
Customizable zone models
Apple Health integration
Workout data syncing
Activity ring tracking
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What's New in Simple Zones

6.0.6

May 15, 2026

UI enhancements and stability improvements

2

In-App Purchases

$9.99

Zones Pro

Get unlimited workout session length

User reviews

Not sure about kcal accuracy

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.
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Found my app

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)

Good App One Big Flaw

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

Custom zones not working

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

Zones are great

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

Developer apps

FAQ

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.