Cardio Zones.

Cardio Zones.

Heart rate based training

40 ratings
21 reviews
#193 in paid Health & Fitness
💪 Health & Fitness
⚽ Sports
$49.99

Price history


Details

  • Released
  • Updated

Features

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About

Train effectively by keeping your heart rate within target zones during various activities. Analyze your performance with cumulative graphs and track your routes. Measure fitness metrics and access preloaded or custom heart rate zones.

Voice assistant for heart rate zone guidance
Cumulative graphs of time in heart rate zones
Fitness level and recovery heart rate rating
Resting Heart Rate & VO2 Max measurement
Preloaded and custom heart rate zones
Location tracking of routes with heart rate data
Export heart data to CSV for analysis
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What's New in Cardio Zones.

4.7.0

December 2, 2025

- Update for iOS 15.6 - 26, watchOS 8.7 - 26 - added support for multi-window, where applicable (iPad) - Add ability to pair a heart rate monitor persistently (iPhone/iPad devices) - Improved compatibility with Apple Health.

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Charts

Top Paid

📉 193-13

Health & Fitness

This app dropped -13 positions in Health & Fitness chart.

Last updated on July 6, 2026.

User reviews

Muito bom

Aplicativo muito top!

Response from developer

Obrigado pela sua avaliação. Resolvi alguns erros recentemente em relação à conectividade com bluetooth. Se você ainda tiver problemas entre em contato comigo via twitter (https://twitter.com/ZoneTrainingApp/) ou envie-me um e-mail da seção de suporte no App

Improvement as a whole exercise app

This app is wonderful and accurate as it seems to refresh every second or two and dominating HR sensor signal so no unnecessary disturbance.

It will give 5 stars if they add a voice of encouragement through out the session that you choose… something like Nike Run Club would be ideal ! HR based or distance based!
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Response from developer

Thank you for the kind review. The app will make remarks of encouragement when your calories hits 500 and 600. I can understand why people like the trainer's remarks from the Nike app, that is because the Nike Run app is focused on getting you better at running. The Cardio zones app was created so I can be focussed on staying in a specific zone, and measuring heart rate recovery but not specific for a particular sport like running, rowing, cycling, etc. Theo

Won’t work if simultaneously using a fitness tracking app

I was so excited when I found this app, since I use the Maffetone method and needed some thing to alert me when I was leaving my preferred cardio zone. However, I always use the map my fitness app on my Apple Watch to track all of my workouts. Unfortunately, CardioZones won’t work if I also use the MapMy Fitness app at the same time. This would’ve been perfect for me, if not for this issue! Dear developer, if at all possible please, please, please develop a solution so that other fitness tracking apps can be used simultaneously with CardioZones! 🙏🏻
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Response from developer

You can't run two workout session at the same time on watchOS. It is a restriction by Apple.

Finally, a fully customizable HR app!

Was thrilled to find this app! My Rowing coach utilizes up to 11 separate zones which are individualized to each athlete and this app allows for that! Thank you for a great app and continued development. The minutes per zone are valuable information though only found on the watch. Also would be great to use with a Garmin as alternative to apple wAtch but that would just be a bonus!
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Response from developer

Thanks for the superstar review. My best feature of my own app is to do sprint runs/walks, I set up the zones so that when I walk my heart reduce reaching the lower zone bound, then telling me up to increase my pace, I run then, until my heart rate an upper limit, then telling me to slow down, so it goes on, up, down, up, down. Of course, takes to fine tune the zones, but it is easy, to tweak a zone, you just copy/paste the old one and then edit it.

Font size for graphs on iPhone

Nice app so far, but difficult for me to read the scale of the plots on the iPhone. Is there a way of changing this within the app? Thanks

Response from developer

Hi Sorry to hear that font size on there graph axes is a problem. You can view an increased font size (and the graph line plots) by zooming in on the graph by using the iOS Accessibility features: iPhone Settings > Accessibility > Zoom > On Theo

Developer apps

FAQ

What is the price of Cardio Zones?

Cardio Zones is a paid app priced at $49.99. There are no subscriptions or extra payments required for full access.

What devices does Cardio Zones support?

Cardio Zones is supported on Apple Watch, iPhone, iPad, and iPod. It is designed to work with your Apple Watch, allowing you to leave your iPhone at home during workouts.

How accurate is Cardio Zones?

The app relies on Bluetooth 4 Heart Rate Service compatible sensors for accurate heart rate data. It provides real-time heart rate, statistical prediction, and training zones shown in graph and text format.

Can I use Cardio Zones without a heart rate sensor?

Yes, if you do not have a Bluetooth heart sensor or Apple Watch, Cardio Zones can still help you calculate your VO2 Max, maximum heart rate, and get optimal heart zones based on your fitness goals.

How often is Cardio Zones updated?

The latest version is 4.7.0, last updated on December 2, 2025. This indicates regular updates to improve functionality and support.

What are the privacy features of Cardio Zones?

Cardio Zones prioritizes user privacy. No login account or external web accounts are required, and your data remains private. You keep your data, and no subscriptions are needed.

What age rating does Cardio Zones have?

Cardio Zones has an age rating of 12+. This suggests it is suitable for users aged 12 and above.

What training zone formulas does Cardio Zones use?

Cardio Zones comes with preloaded heart rate training zones using formulas like Karvonen & Zoladz, British Cycling Coaches, and Joe Friel Running & Cycle. You can also create your own bespoke heart rate zones.