# Zone 2: Heart Rate Training — Cardio zones workout HR alerts

> Track weekly Zone 2 heart rate training for endurance and fat burning. (iPhone/iPad app by Shannon Bolick.)

- Source: https://appshunter.io/ios/app/zone-2-heart-rate-training/id6444690892 (this page in markdown: same URL + `.md`)
- Developer: [Shannon Bolick](https://appshunter.io/developer/976434392)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases (on sale, was $4.99)
- Rating: 4.64/5 from 239 App Store ratings · 56 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 15 MB
- Languages: English
- Released: 2023-02-22
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/zone-2-heart-rate-training/id6444690892/reviews.md

## What is Zone 2?

Zone 2 app tracks how much of your weekly workout time is performed in the zone 2 heart rate range, typically between 60-70% of your maximum heart rate. 

Aiming for 150 minutes or more of weekly exercise in zone 2 is recommended, as it optimizes endurance, enhances fat-burning efficiency, and fosters sustainable fitness gains by maintaining a balance between intensity and recovery. The optimal number of minutes to spend in zone 2 per week can vary based on individual fitness levels.

_____________________

If you do not have an Apple Watch, you can connect common Bluetooth heart rate monitors, such as the Polar H10, Garmin chest strap, and new Garmin watches, to view your heart rate zone progress live during a workout.

If you have an Apple Watch, use the Apple Watch app to see zones live on your wrist with haptic feedback, Siri announcements, and health metrics.

If you already have a different app you like for tracking workouts, no worries; Zone 2 uses all workouts saved to your device with heart rate data to calculate your weekly zone minutes.

*** Features Include ***
• Weekly, monthly, & daily zone tracking based on your weekly goal with multiple chart viewing options
• Strava connectivity to upload Zone 2 created distance workouts to your Strava profile
• Home Screen and Lock Screen widgets for weekly Zone 2 goal progress
• Compatibility with common Bluetooth heart rate monitors for live zone reporting during workouts with optional audio feedback
• Apple Watch app with live zone total calculations, multiple workout screens, and optional haptic feedback and alerts
• Apple Watch to iPhone mirroring during live workouts to see heart rate on the larger iPhone screen
• Zone goal or open goal modes for tracking workouts
• Heart rate zone calculator
• Live activities on the Dynamic Island or Lock Screen

_____________________

What is zone 2 heart rate training?

Zone 2 training refers to exercise performed at a moderate intensity that keeps your heart rate in a specific heart rate zone, typically between 60-70% of your maximum heart rate. This is the heart rate zone where your body is able to utilize oxygen most efficiently, which can lead to a range of benefits for your fitness and health.

Zone 2 training is important for a number of reasons, including:

• Improved aerobic capacity: By training in the zone 2 heart rate range, your body becomes more efficient at using oxygen to produce energy, which can improve your overall aerobic capacity.
• Increased fat burning: During moderate-intensity exercise, your body relies more on fat as a source of fuel, which can help to improve your body composition and reduce body fat.
• Improved cardiovascular health: Regular exercise in the zone 2 heart rate range can help to strengthen your heart and improve blood flow, which can reduce the risk of heart disease.
• Increased endurance: Training at a moderate intensity can help to improve your endurance and stamina, which can be particularly helpful for endurance athletes such as long-distance runners or cyclists.

_______________

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Weekly, monthly, and daily zone tracking
- Strava connectivity
- Home and Lock Screen widgets
- Bluetooth heart rate monitor compatibility
- Apple Watch app with live feedback
- Heart rate zone calculator

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Unlock All - Monthly | $4.99 | per month |
| Unlock All - Yearly | $39.99 | per year |


## What do users think of Zone 2?

Overall sentiment: positive

**Pros**

- 👍 Simple and intuitive user interface
- ⏱️ Accurate real-time zone tracking during workouts
- 📊 Comprehensive cumulative time tracking by zone
- 🎯 Customizable heart rate zones and weekly goals
- 🔗 Seamless integration with Apple Health and HR monitors
- 📱 Large, easy-to-read display
- 🎧 Audio alerts for zone changes
- ⌚ Works effectively with Apple Watch
- 🚀 Responsive developer with quick feature implementation
- 💬 Excellent customer support from developer Shannon
- 🎨 Polished and elegant design
- 🔄 Background app functionality

**Cons**

- 🐛 Frequent Bluetooth disconnections from HR monitors
- 🐛 App crashes and freezes mid-workout
- 🐛 Tracking stops randomly during workouts
- 📵 Portrait-only orientation (doesn't support landscape properly)
- 💳 Pricing confusion and unexpected charges
- 🔔 Excessive review prompts during workouts
- ⚠️ Compatibility issues with some iPhone models
- 📊 Zone calculation based on HRR instead of max HR percentage
- 🎯 Mandatory Zone 2 goal that can't be disabled
- ❌ Requires Apple Fitness subscription (according to one user)

**Commonly reported bugs**

- App crashes on iPhone 11 Pro and iPhone 16 with latest iOS
- Watch disconnects constantly during workouts
- Tracking stops mid-workout without saving data
- Bluetooth connectivity issues with Polar and other HR monitors
- App freezes at various points during exercise
- Landscape mode flicks back to portrait automatically
- App continues running in background after closing
- Mirroring to iPhone functionality broken in version 2.7
- Random disconnections from Apple Watch

**Most requested features**

- Calorie burn tracking and display
- Landscape orientation support for treadmills and rowers
- More specific workout categories beyond provided options
- Music control integration (play, pause, skip)
- Step tracking during workouts
- Expanded time period views for zone totals
- Voice notifications through headphones instead of watch speakers
- Option to disable Zone 2 goal for live-only tracking

## Recent user reviews (10 of 56)

All indexed reviews: https://appshunter.io/ios/app/zone-2-heart-rate-training/id6444690892/reviews.md

### 2/5 — Widget usually shows old data

*2026-05-09, version 4.0.6*

The main reason I tried this app was to show the number of minutes of zone 2 so far this week.  The app does do that in principle , but it’s more-or-less unusable for that purpose in practice because it usually shows old data that doesn’t include the latest workouts, for example.  

Sometimes you can cause the widget to update by opening the app.  But I’m always left wondering if the widget I’m looking at is showing wrong data.

### 5/5 — Good App

*2025-12-11*

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.

### 5/5 — zone2로 유산소하기 좋음

*2025-11-11*

천국의계단이나 마이마운틴할 때 애플워치로 존2 유지하기 딱인 앱이에요. 벗어나면 알림 오고, 심박수 실시간으로 보여주고 아주 굿. 기능에 충실한 앱임.

### 5/5 — Perfect!

*2025-08-25*

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

### 5/5 — Simple way to track zone 2 over time

*2025-07-08, version 3.2.5*

Exactly what I’ve been looking for. I can set a target for the week of zone 2 and 5 and can keep track. 

Can check straight after workouts to see if I need to spend some extra time in zone 2

The live Work out with current zone on your phone is great for cycling.

### 5/5 — Great app for zone specific training

*2025-06-16, version 3.2.3*

Very happy with the app, and very impressed by the developer. The app does exactly what it says, allows you to track how long you’ve been training in a specific zone. I suggested to the developer that a landscape orientation would be useful for rowers / Concept2 users. Very soon after, this feature was included in the app. Now it’s perfect - for me, anyway!

### 5/5 — Excellent app & support

*2025-06-08*

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.

**Developer response:** Thank you!

### 5/5 — Visibility = Consistency   Love this app!

*2025-06-01, version 3.2.2*

This app has been extremely helpful by providing excellent visibility of my Zone 2 status!  I use it regularly on home cardio equipment.

### 5/5 — Intuitive

*2025-05-30*

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.

### 5/5 — Please Show Calories Burn

*2025-05-08, version 3.1*

Please Show Calories Burn

## Frequently asked questions about Zone 2

### What is Zone 2 heart rate training?

Zone 2 training involves exercising at a moderate intensity where your heart rate is typically between 60-70% of your maximum heart rate. This zone is optimal for utilizing oxygen efficiently, leading to improved aerobic capacity, increased fat burning, better cardiovascular health, and enhanced endurance.

### How does this app track my Zone 2 minutes?

The app tracks your Zone 2 minutes by using workout data saved to your device that includes heart rate information. It can connect with common Bluetooth heart rate monitors and has an Apple Watch app for live tracking and feedback during workouts.

### What devices are compatible with this app?

The app is compatible with common Bluetooth heart rate monitors like Polar H10 and Garmin chest straps, as well as new Garmin watches. It also features a dedicated Apple Watch app for live zone tracking and feedback directly on your wrist.

### Can I use this app if I already use another workout tracker?

Yes, the app is designed to work with your existing workout tracking. It utilizes all workouts saved to your device that contain heart rate data, so you don't need to switch your primary workout tracking app.

### What are the benefits of aiming for 150 minutes of Zone 2 exercise weekly?

Aiming for 150 minutes or more of weekly exercise in Zone 2 is recommended for optimizing endurance, enhancing fat-burning efficiency, and fostering sustainable fitness gains. This balance between intensity and recovery helps improve your body's ability to use oxygen and strengthens your cardiovascular system.

## Version history (last 5 releases)

### 4.2.4 — 2026-08-13

• Fixes and improvements to the Strava upload integration

### 4.2.3 — 2026-08-12

• Consolidated Health permission requests

### 4.2.2 — 2026-08-01

• Added a new Trends tab -- check it out!
• Misc updates and improvements

### 4.2.1 — 2026-07-29

• Minor UI and reliability updates

### 4.2 — 2026-07-24

• Fixes and improvements to the Friends features
• Reliability updates to Widgets
• Other misc bug fixes and updates

## Apps similar to Zone 2

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [CardioBot: Heart Rate Monitor](https://appshunter.io/ios/app/cardiobot-heart-rate-monitor/id1149412984) | 4.5 (10,078) | Free | Health & Fitness |
| [FITIV Pulse - Workout Tracker](https://appshunter.io/ios/app/fitiv-pulse-workout-tracker/id942494517) | 4.6 (12,632) | 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 |
| [Heart Rate Plus: Pulse Monitor](https://appshunter.io/ios/app/heart-rate-plus-pulse-monitor/id1061544495) | 4.5 (3,649) | 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 |
| [Instant Heart Rate+ HR Monitor](https://appshunter.io/ios/app/instant-heart-rate-plus-hr-monitor/id395042892) | 4.9 (31,886) | Free | Health & Fitness |

## More apps by Shannon Bolick

- [ABIT: Custom Exercise Programs](https://appshunter.io/ios/app/abit-custom-exercise-programs/id1274605002)
- [Fish Bowl - Group Game](https://appshunter.io/ios/app/fish-bowl-group-game/id1317655075)
- [Slow Eats for Weight Loss](https://appshunter.io/ios/app/slow-eats-for-weight-loss/id1645476380)
- [Searched: Saved Maps](https://appshunter.io/ios/app/searched-saved-maps/id6450062511)
- [A Good Day: Daily To Do List](https://appshunter.io/ios/app/a-good-day-daily-to-do-list/id6466505889)

All apps by Shannon Bolick: https://appshunter.io/developer/976434392

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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 2026-08-25.*