# BurnCoach — Heart Rate Zone 2 Fat Burn

> Heart Rate Zone 2 Fat Burn (iPhone/iPad app by Byoungho Kim.)

- Source: https://appshunter.io/ios/app/burncoach/id6762002420 (this page in markdown: same URL + `.md`)
- Developer: [Byoungho Kim](https://appshunter.io/developer/1888452963)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 5 MB
- Languages: American English, Japanese, Korean, Chinese (Simplified, China)
- Released: 2026-08-11
- Data updated: 2026-09-13
- User reviews in markdown: https://appshunter.io/ios/app/burncoach/id6762002420/reviews.md

## What is BurnCoach?

Real-time heart rate coaching for the most efficient fat-burning intensity: Zone 2.
Your Apple Watch keeps you in the sweet spot — not too fast, not too slow — every second of your workout.
Diet results come from intensity, not just time.

■ Why BurnCoach is different

• Built for Zone 2 — Not just a heart rate display. BurnCoach tells you exactly how to adjust, every moment.
• Voice + haptic coaching — Don't even look at your wrist. Cues drop into your music like Apple Maps navigation.
• Auto phases — Warm-up, main, and cool-down transition automatically based on time and intensity.
• Live glow ring — The ring color changes the instant you cross zones, glanceable on your wrist.

■ Core features

• Real-time heart rate + zone detection (Rest, Warm-up, Fat Burn, Cardio, Peak, Max)
• Automatic Zone-time and Fat Burn duration tracking
• Post-workout report — zone distribution, average/max BPM, calories, GPS route (outdoor)
• Two-way HealthKit sync — pulls in workouts from other apps and writes back yours
• Live Activity / Dynamic Island — see your zone from the lock screen
• Pace coaching — voice cues to slow down or speed up
• Bluetooth heart rate monitors — pair a chest strap and train with iPhone only, no watch needed
• Start from iPhone — remotely launch the watch workout, or start right on iPhone with your HRM

■ Why Zone 2 matters

Zone 2 (60–70% of max heart rate) is where your body uses fat as the primary fuel.
• Faster (Zone 3+): you burn more carbs, less fat efficiency.
• Slower (Zone 1): not enough caloric demand to matter.

If your goal is weight loss, time-in-Zone-2 is the most honest metric.

■ With or without a watch

• Standalone Apple Watch — runs entirely on your watch; leave your iPhone at home. History syncs when reconnected.
• No watch? — pair a Bluetooth heart rate monitor (chest strap) and get the same real-time zone coaching on iPhone alone.
• Smart audio routing — coaching speaks through your earphones when connected, or your watch speaker when not.

■ Privacy first

All workout data stays on your device. No external servers. HealthKit access is fully controlled by you.

■ Requirements

• iPhone: iOS 17 or later
• Apple Watch: watchOS 10 or later (optional — Series 4 and newer recommended)
• Bluetooth heart rate monitor: standard heart rate profile devices (optional — for training without a watch)

Make every 30 minutes count.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| BurnCoach Pro Lifetime | $3.99 | one-time |



## Version history (last 2 releases)

### 1.0.1 — 2026-08-17

1.0.1 — Language fixes

• Fixed screens that still showed Korean text when the app was used in English, Japanese, or Chinese. Workout, reports, history, settings, and the Watch app were all re-checked.
• Fixed interval voice coaching speaking in the wrong language.
• Notifications such as weekly goal completion now follow your language too.
• Detailed report PDFs and share images now follow the app language, dates included.
• Permission prompts, widgets, Live Activity, and the Watch complication now follow your language too.

### 1.0 — 2026-08-11

No release notes.

## More apps by Byoungho Kim

- [MemoGraph: Knowledge Graph](https://appshunter.io/ios/app/memograph-knowledge-graph/id6761298897)
- [PassportLens - Passport Photo](https://appshunter.io/ios/app/passportlens-passport-photo/id6761932283)
- [PhotoTrail: Geotag & Trip Map](https://appshunter.io/ios/app/phototrail-geotag-and-trip-map/id6762003017)
- [Inner Journey: Self-Discovery](https://appshunter.io/ios/app/inner-journey-self-discovery/id6762345626)
- [Komorebi — Film Camera](https://appshunter.io/ios/app/komorebi-film-camera/id6762462574)

All apps by Byoungho Kim: https://appshunter.io/developer/1888452963

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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 2026-09-13.*