# HRZones — Heart Rate Training Zones

> Heart rate training zone calculator for personalized fitness optimization. (iPhone/iPad app by Joao Frasco.)

- Source: https://appshunter.io/ios/app/hrzones/id1412520667 (this page in markdown: same URL + `.md`)
- Developer: [Joao Frasco](https://appshunter.io/developer/1105081507)
- Category: Sports, Utilities
- Price: $0.99
- Rating: 3.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English
- Released: 2018-07-28
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hrzones/id1412520667/reviews.md

## What is HRZones?

Heart Rate Zones – Calculate Your Training Zones

HR Zones is a powerful yet simple heart rate training zone calculator that helps you optimize your workouts. Choose your date of birth and calculation method, and the app instantly calculates five distinct heart rate zones tailored to your personal fitness profile.

Now with multiple calculation methods! Select from traditional formulas or enter your own maximum heart rate from a stress test. Enable the Karvonen formula by entering your resting heart rate for even more personalized zones that account for your fitness level.

Key Features:
• Multiple maximum heart rate calculation methods:
  - Standard (220 - age)
  - Tanaka (more accurate for older adults)
  - Gulati (optimized for women)
  - Custom (enter your own from stress test)
• Gender selection with automatic formula recommendations
• Resting heart rate input enables Karvonen formula
• Five personalized training zones with color coding and icons
• Tap any zone for detailed information
• Learn benefits, activities, and training tips for each zone
• Precise BPM ranges calculated for your profile
• Settings screen for easy configuration
• Haptic feedback for enhanced interaction
• Smooth animations and polished design
• Beautiful gradient background
• Optimized for light and dark mode
• All preferences saved automatically

How It Works:
1. Enter your date of birth and select gender (optional)
2. Choose your preferred calculation method in Settings
3. Optionally enter resting heart rate for Karvonen formula
4. View your calculated maximum heart rate
5. See your five personalized training zones with BPM ranges
6. Tap any zone to learn more about it
7. Use the zones to guide your workouts and achieve your goals

Perfect For:
• Runners and cyclists
• Fitness enthusiasts
• Personal trainers and coaches
• Anyone monitoring heart rate training
• Beginners learning about zone training
• Athletes optimizing performance
• Women wanting female-specific calculations
• Older adults needing accurate formulas

Heart Rate Zones puts the power of science-based zone training in your pocket with the most accurate calculations available. Download now and train smarter!

## Key features

- Multiple heart rate calculation methods
- Personalized five training zones
- Detailed zone information
- Karvonen formula support
- Gender-specific recommendations
- Color-coded zones with icons

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/hrzones/id1412520667/reviews.md

### 5/5 — Great app thanks to a responsive developer

*2026-01-02*

Was looking for an HR app that would allow me at a glance to see my HR zones, eg, while running on a treadmill. Downloaded this and was disappointed at first. Aesthetically it had a pleasing appearance and good customizability within the settings. BUT, some of the screen was cutoff on my iPhone Mini 13. What was worse was that the way screen elements were rendered, I couldn’t enter my birthdate- making the HR calculation useless. 

I emailed the developer- around New Year’s Eve- and (1) got a response quickly, and (2) he developed a bug fix 2 days after and emailed me to let me know. I just downloaded it and it works perfectly now. Best HR app for my needs, and I’m super impressed with the developer’s support. 

Highly recommended.

## Frequently asked questions about HRZones

### What is HRZones?

HRZones is a mobile application designed to calculate your personalized heart rate training zones. It uses your personal data and various calculation methods to provide precise BPM ranges for optimal workout guidance.

### How does HRZones calculate training zones?

HRZones calculates training zones using your date of birth and selected calculation method. It can also incorporate your resting heart rate to enable the Karvonen formula for more personalized results.

### What calculation methods does HRZones offer?

HRZones supports multiple calculation methods including Standard (220 - age), Tanaka, Gulati (optimized for women), and a Custom option where you can enter your own maximum heart rate from a stress test.

### Can HRZones be used by women?

Yes, HRZones includes the Gulati formula, which is optimized for women, and allows for gender selection with automatic formula recommendations.

### Does HRZones have ads?

No, HRZones does not contain advertisements. It is a paid application that offers an ad-free experience.

### What devices is HRZones available on?

HRZones is available on iPhone and iPad devices, offering a consistent experience across Apple's mobile platforms.

### How often is HRZones updated?

The latest version of HRZones is 2026.01.01, which was last updated on January 2, 2026. Updates typically focus on improving features and ensuring compatibility.

### What is the price of HRZones?

HRZones is a paid application priced at $0.99. This one-time purchase grants you access to all its features without any recurring fees or in-app purchases.

## Version history (last 5 releases)

### 2026.01.01 — 2026-01-02

Bug fix for smaller screens!

### 2025.12.31 — 2026-01-01

Bug fixes and enhancements!

### 2025.11.04 — 2025-11-05

Enhanced Calculations

• Multiple calculation methods (Standard, Tanaka, Gulati, Custom)
• Gender selection with automatic formula recommendations
• Resting heart rate input enables Karvonen formula
• New Settings screen for easy configuration
• More accurate zones based on your personal profile
• Detailed information about each calculation method
• All preferences saved automatically
• Improved zone calculations accounting for fitness level

Brand new Help ad About view!

### 2025.11.03 — 2025-11-04

Interactive Zones

• Tap any zone to see detailed training information
• Learn specific benefits of each heart rate zone
• Discover example activities and exercises for each zone
• Get training tips and recommendations
• See recommended duration for each zone
• Haptic feedback when tapping zones
• Comprehensive zone information at your fingertips

### 2025.11.02 — 2025-11-03

Updated to iOS 26!

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All apps by Joao Frasco: https://appshunter.io/developer/1105081507

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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 2026-08-27.*