# Zone 2 – Heart Rate Trainer — Heart Rate Zones & Workout

> Heart Rate Zones & Workout (iPhone/iPad app by Vu Tran.)

- Source: https://appshunter.io/ios/app/zone-2-heart-rate-trainer/id6761515338 (this page in markdown: same URL + `.md`)
- Developer: [Vu Tran](https://appshunter.io/developer/1890093055)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 6 MB
- Languages: American English
- Released: 2026-04-08
- Data updated: 2026-07-11
- User reviews in markdown: https://appshunter.io/ios/app/zone-2-heart-rate-trainer/id6761515338/reviews.md

## What is Zone 2?

Zone2 Pro – Your Personal Heart Rate Zone Trainer

Zone 2 training is the foundation of aerobic fitness. Zone2 Pro helps you stay in the optimal heart rate zone for fat burning, endurance building, and cardiovascular health.

KEY FEATURES:

• Real-Time Heart Rate Zone Tracking
Connect with Apple Watch for live heart rate monitoring. See instantly which zone you're in with beautiful visual feedback.

• 5 Heart Rate Zones
- Zone 1: Recovery (50-60% HR)
- Zone 2: Aerobic / Fat Burning (60-70% HR)
- Zone 3: Tempo (70-80% HR)
- Zone 4: Threshold (80-90% HR)
- Zone 5: VO2 Max (90-100% HR)

• Smart Zone Calculation
Uses the Karvonen formula for accurate zone calculation based on your max heart rate and resting heart rate. Supports multiple max HR calculation methods including age-based, VO2 Max, workout data, and manual entry.

• Weekly Zone 2 Goal
Set your weekly Zone 2 training target and track your progress with intuitive progress bars.

• Workout History
Log and review all your workouts with detailed zone breakdowns, duration, calories, and distance.

• Statistics Dashboard
View your training trends over time – daily, weekly, and monthly stats.

• Multiple Workout Types
Support for running, cycling, walking, hiking, swimming, tennis, elliptical, rowing, stair stepper, cross training, yoga, pilates, and strength training.

• Apple Watch Companion
Track workouts directly from your wrist with real-time zone feedback.

• HealthKit Integration
Seamlessly syncs with Apple Health for comprehensive health data.

• Beautiful Dark Mode UI
Liquid glass design with luminous accents for a premium experience.

Whether you're a beginner building your aerobic base or an experienced athlete optimizing Zone 2 training, Zone2 Pro is your essential companion.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Unlock | $4.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-04-08

No release notes.

## More apps by Vu Tran

- [Body Scan AI: Body Fat](https://appshunter.io/ios/app/body-scan-ai-body-fat/id6763810084)

All apps by Vu Tran: https://appshunter.io/developer/1890093055

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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 2026-07-11.*