# Zone 2: Heart Rate Trainer — Longevity Score & AI coaching

> Longevity Score & AI coaching (iPhone/iPad app by Jung Soon Shin.)

- Source: https://appshunter.io/ios/app/zone-2-heart-rate-trainer/id6762046665 (this page in markdown: same URL + `.md`)
- Developer: [Jung Soon Shin](https://appshunter.io/developer/379186743)
- Category: Health & Fitness, Medical
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 17.0 · 15 MB
- Languages: American English, Arabic, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese, Korean, Polish and 7 more
- Released: 2026-04-21
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/zone-2-heart-rate-trainer/id6762046665/reviews.md

## What is Zone 2?

Zone 2 training is the science-backed foundation of mitochondrial health, VO2 Max growth, and longevity. But "Zone 2 minutes" alone don't tell
  you whether you're actually building a longer healthspan.

  Zone 2 Longevity Coach computes a composite Longevity Score (0–100) from four weighted dimensions — Zone 2 minutes (40%), sleep (30%), VO2 Max
  (20%), and resting heart rate (10%) — pulled directly from Apple Health. Every week, an AI coach reads your data and produces a personalized
  summary plus three recommendations that are deliberately biased toward your weakest dimension, so each action moves your score the most.

  WHAT'S INSIDE
  • Composite Longevity Score with weighted breakdown across the four pillars
  • Personalized Zone 2 heart rate range via the Karvonen method (resting HR + age)
  • Weekly AI coaching summary written specifically against your week's data
  • 14-day Zone 2 minutes trend chart
  • Shareable weekly progress card sized for Instagram Stories
  • Pull-to-refresh on every tab

  APPLE WATCH
  • Standalone watchOS companion shows your week's Zone 2 progress
  • Watch complications for circular, rectangular, corner, and inline faces
  • Live ring updates against your personalized HR range, not a generic estimate

  HOME & LOCK SCREEN WIDGETS
  • Small home widget with weekly progress ring + today's minutes
  • Lock Screen rectangular, circular, and inline widgets
  • Refreshed hourly from the App Group

  PREMIUM
  • 7-day free trial — no charge during the trial, cancel anytime
  • Reminders 2 days and 1 day before renewal so you choose with intent
  • Weekly AI coaching, full longevity score breakdown, trend charts, share cards
  • Monthly or annual subscription

  PRIVACY
  • Health data is read directly from Apple Health on your device
  • No third-party analytics or ad SDKs
  • Account + all server-side data deletable from Settings

  This app is not a medical device. It does not diagnose, treat, or prevent any condition. Consult your physician before changing your training
  routine.
Privacy Policy: https://ootssu.com/zone2/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Zone 2 tracking 2 Monthly | $4.99 | per month |
| Zone tracking 2 Annual | $29.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Zone 2 Lifetime | $49.99 | one-time |



## Version history (last 5 releases)

### 2.2.0 — 2026-08-14

Fixed sign-up failing silently for some accounts. AI text now renders properly instead of showing raw formatting marks. Subscription restore is more reliable when you change devices or reinstall.

### 2.1.21 — 2026-08-04

Fixed an issue where an active subscription could still show as free.

Some purchases went through without unlocking Pro. If this affected you, relaunch the app or tap Restore Purchases in Settings.

### 2.1.20 — 2026-08-03

Small improvements and bug fixes to keep things running smoothly.

### 2.1.19 — 2026-07-20

• New: discover Plotta, a real-world GPS walking game where you claim territory, right from Settings.

### 2.1.18 — 2026-07-16

Small improvements and bug fixes to keep things running smoothly.

## More apps by Jung Soon Shin

- [Gravity Duel: Space Battle](https://appshunter.io/ios/app/gravity-duel-space-battle/id379186740)
- [Paxio: Money Mindset Coach](https://appshunter.io/ios/app/paxio-money-mindset-coach/id390872626)
- [Pawport — Rate Compare](https://appshunter.io/ios/app/pawport-rate-compare/id391679813)
- [Chunja — Cheonjamun](https://appshunter.io/ios/app/chunja-cheonjamun/id392902342)
- [PulseCalm – HRV Stress Relief](https://appshunter.io/ios/app/pulsecalm-hrv-stress-relief/id6762072502)

All apps by Jung Soon Shin: https://appshunter.io/developer/379186743

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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 2026-08-19.*