# FatBurn Watch — Fat-burn heart alerts

> Fat-burn heart alerts (iPhone/iPad app by LFT Inc..)

- Source: https://appshunter.io/ios/app/fatburn-watch/id6763567392 (this page in markdown: same URL + `.md`)
- Developer: [LFT Inc.](https://appshunter.io/developer/1776796858)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 11 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Chinese (Simplified, China), European Spanish
- Released: 2026-04-28
- Data updated: 2026-08-13
- User reviews in markdown: https://appshunter.io/ios/app/fatburn-watch/id6763567392/reviews.md

## What is FatBurn Watch?

FatBurn Watch helps you stay in your fat-burn heart-rate zone during cardio workouts at the gym.

Set your profile and target zone on iPhone, then start a workout on Apple Watch. When your heart rate stays above the upper limit, the Watch alerts you with haptics, sound, and an on-screen warning so you can ease back without staring at the screen.

Key features
- Start and stop workouts on Apple Watch
- See real-time heart rate during a session
- Estimate HRmax from age (Fox or Tanaka formula)
- Personalize your zone with resting heart rate (Karvonen method) and measured HRmax from Health
- Tune target zone (% of HRmax or Direct bpm) and alert sensitivity
- Mute alerts for short breaks
- Save workouts to HealthKit

Privacy
Heart-rate and workout data stay on device and in HealthKit. FatBurn Watch does not send this data to external servers, track you, show ads, or use third-party analytics.

Important
FatBurn Watch is not a medical device. It is a heart-rate feedback tool for workouts and is not intended to diagnose, treat, or prevent any medical condition. Consult a physician if you have health concerns.


## Version history (last 5 releases)

### 1.12 — 2026-08-07

• Added an About section to the Profile screen so you can check the app name and version inside the app
• You can now open the support site, website, and privacy policy directly from the app

### 1.11 — 2026-08-05

• New: Home Screen and Lock Screen widgets, plus Apple Watch complications
• Launching the app from a widget is free for everyone
• With Pro, see this week's fat burned, goal progress, and streak right on the widget

### 1.10 — 2026-08-02

• New: Pro adds weekly goals, streaks, and period-over-period comparison (one-time purchase)
• Everything you already use stays free
• Added a short launch animation on iPhone that flows from the launch screen into the app

### 1.8 — 2026-07-31

• Personalized heart-rate zones: optionally use your resting heart rate (Karvonen method) and measured HRmax from Health to tailor your target zone
• New personalization settings with per-item toggles and an explanation of how your zone is calculated

### 1.7 — 2026-07-19

• Fixed an issue where the workout end action could run twice when tapped repeatedly
• Unified the Health permission description texts

## More apps by LFT Inc.

- [10年日記 - 毎日の記録と振り返り](https://appshunter.io/ios/app/10/id6746846382)
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- [Neon Nexus](https://appshunter.io/ios/app/neon-nexus/id6759724762)
- [Marumaru Sort](https://appshunter.io/ios/app/marumaru-sort/id6759857831)
- [Corporate Slave Solitaire](https://appshunter.io/ios/app/corporate-slave-solitaire/id6760183831)

All apps by LFT Inc.: https://appshunter.io/developer/1776796858

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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 2026-08-13.*