Reviews of Zone 2: Heart Rate Training

By: Shannon Bolick App

List of user reviews and ratings for Zone 2: Heart Rate Training

Total ratings

4.70 (Rating count: 236)

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Review summary

Zone 2: Heart Rate Training is a simple, effective tool for real-time zone tracking and time-in-zone goals. Users praise its focused design, customizable zones, and strong support, with reliable alerts and Apple Watch integration. Recurrent drawbacks center on stability and connectivity, including crashes, freezes, and monitor disconnections, though developers often resolve issues quickly.

Pros

Real-time zone tracking during workouts with on-screen zone display and per-zone time, plus weekly progress.
Simple, focused interface that emphasizes zone tracking without extraneous metrics.
Customizable heart-rate zones and broad compatibility with HR monitors, Apple Health, and Apple Watch.
Excellent developer support and responsiveness, with quick fixes and feature requests implemented.
Reliable in-workout alerts/notifications when crossing zones, including voice alerts on Apple Watch.

Cons

Stability issues: crashes, freezes, and workouts not saving (disrupting sessions).
Connectivity/disconnection with heart-rate monitors and devices (Apple Watch, Polar, etc.).
Occasional update/compatibility issues on certain devices or OS versions.

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User Reviews

Recent rating average: 4.70

All time rating average: 4.70

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10% (3)

Date	Author	Comment
2025-12-11	Wa*****	I am new to Zone 2 training for Weight Loss but I am finding the app very beneficial. It’s hard for me to log into Zone 2 on a elliptical machine. Some sort of graph that tracks. My history might help me hit this sound better, but this product is pushing me in the right direction.
I am new to Zone 2 training for Weight Loss but I am finding the app very beneficial. It’s hard for me to log into Zone 2 on a elliptical machine. Some sort of graph that tracks. My history might help me hit this sound better, but this product is pushing me in the right direction.
2025-08-25	C7*****	This app does exactly what I need! Shows you what zone you are in during a workout, tracks cumulative time in your species zone (2 for me), and tracks weekly time in zone. I am aiming for 150 minutes and this app keeps me on track
This app does exactly what I need! Shows you what zone you are in during a workout, tracks cumulative time in your species zone (2 for me), and tracks weekly time in zone. I am aiming for 150 minutes and this app keeps me on track
2025-06-08	CN*****	I love the app. Straightforward and perfect for tracking cardio workouts without the extraneous nonsense that so many fitness apps overcharged for. Shannon provides outstanding support, too. If you want to track cardio workouts by time spent in customizable heart-rate zones, this is a terrific choice.
I love the app. Straightforward and perfect for tracking cardio workouts without the extraneous nonsense that so many fitness apps overcharged for. Shannon provides outstanding support, too. If you want to track cardio workouts by time spent in customizable heart-rate zones, this is a terrific choice.
2025-06-01	Je*****	This app has been extremely helpful by providing excellent visibility of my Zone 2 status! I use it regularly on home cardio equipment.
This app has been extremely helpful by providing excellent visibility of my Zone 2 status! I use it regularly on home cardio equipment.
2025-05-30	Mc*****	If you are interested in monitoring your zones during your workouts this app is the one. Standard or custom HR zones, compatible with most HR monitors, sync w/ Apple health. My fav part is the large easy to read display.
If you are interested in monitoring your zones during your workouts this app is the one. Standard or custom HR zones, compatible with most HR monitors, sync w/ Apple health. My fav part is the large easy to read display.
2025-05-08	Bi*****	Please Show Calories Burn
Please Show Calories Burn
2025-05-04	No*****	This is a simple app to assist with zone 2 training. Recommend strongly. I follow Peter Attia and he is big on zone 2 training. Zone 2 training improves metabolic health. I wanted a HR system that would alert me when I was above or below the zone 2 range and at the same time would allow me to listen to a podcast. Anything above this is more than I wanted. Keep it simple. Found this combo with the zone 2 app and a $50 Garmin Dual HR strap.
This is a simple app to assist with zone 2 training. Recommend strongly. I follow Peter Attia and he is big on zone 2 training. Zone 2 training improves metabolic health. I wanted a HR system that would alert me when I was above or below the zone 2 range and at the same time would allow me to listen to a podcast. Anything above this is more than I wanted. Keep it simple. Found this combo with the zone 2 app and a $50 Garmin Dual HR strap.
2025-03-11	mi*****	Accuracy and an app that runs in the background. Only issue is the calculation does zones based on HRR, not percentage of max HR
Accuracy and an app that runs in the background. Only issue is the calculation does zones based on HRR, not percentage of max HR
2025-03-05	Bd*****	Great for tracking zone 2 over time. I had an idea for a new feature and emailed Shannon. She responded promptly and had it implemented in a few days, amazing!
Great for tracking zone 2 over time. I had an idea for a new feature and emailed Shannon. She responded promptly and had it implemented in a few days, amazing!
2025-03-05	Br*****	Generally love this app. But my wife just updated it on 3/5/25 and it won’t open. She has an iPhone 16 and the latest iOS. The app gets stuck in the load screen. My update seems to work. Could use some feedback.
Generally love this app. But my wife just updated it on 3/5/25 and it won’t open. She has an iPhone 16 and the latest iOS. The app gets stuck in the load screen. My update seems to work. Could use some feedback.