# Tuning: HRV Stress Monitor — Recovery, Sleep & Energy Score

> Recovery, Sleep & Energy Score (iPhone/iPad app by 发亮 刘.)

- Source: https://appshunter.io/ios/app/tuning-hrv-stress-monitor/id6766739763 (this page in markdown: same URL + `.md`)
- Developer: [发亮 刘](https://appshunter.io/developer/1830179467)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 12+
- Requires: iOS 16.6 · 8 MB
- Languages: American English, Dutch, French (France), German (Germany), Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China), European Spanish and 3 more
- Released: 2026-05-17
- Data updated: 2026-08-23
- User reviews in markdown: https://appshunter.io/ios/app/tuning-hrv-stress-monitor/id6766739763/reviews.md

## What is Tuning?

Know your stress before it knows you. Tuning reads your Heart Rate Variability (HRV) from Apple Watch and turns it into a daily Recovery and Energy Score, so you can train smarter, sleep deeper and stay calm under pressure.

WHY TUNING
- Spot stress building before you feel it
- Wake up to a personal Readiness Score
- Know exactly when to push and when to rest
- Improve sleep, focus and recovery with daily guidance
- Privacy first: all processing happens on your device

HOW IT WORKS
Tuning analyzes the HRV and resting heart rate data collected by your Apple Watch, interprets your autonomic nervous system, and translates complex biometrics into one simple number you can act on every morning.

KEY FEATURES
- HRV-based stress and recovery monitoring
- Daily Recovery Score and Energy Score
- Nervous system resilience trends (weekly and monthly)
- Guided breathing sessions for instant calm
- Apple Watch app with automatic background sync
- Clean, calm dashboard. No clutter, no anxiety
- On-device processing. Your health data never leaves your iPhone

WHO IT IS FOR
- Athletes optimizing training and recovery
- Professionals fighting burnout
- Frequent travelers managing jet lag
- Anyone who wants to understand their body better

WHAT MAKES US DIFFERENT
Most wellness apps show raw numbers and leave you guessing. Tuning gives one clear answer every day: how ready is your body today. No medical jargon, no data overload. We do not sell your data and we never will.

Download Tuning and find your balance again.

Tuning is a wellness tool, not a medical device. It does not provide medical diagnosis or treatment.

Privacy Policy: https://www.notion.so/Privacy-Policy-35356eabf14680bcb2cde014fdf82754
Terms of Use: https://www.notion.so/Terms-of-Use-35356eabf146806ba831f3001c18a01d
Apple Standard End User License Agreement (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Vagus Pro | $5.99 | per year |
| Vagus Pro | $1.99 | per month |



## Version history (last 5 releases)

### 1.1.5 — 2026-08-13

What's New in Tuning

This update makes Tuning more honest, clearer, and easier to start:

- Corrected SDNN and RMSSD terminology across the app for accurate HRV labels.
- Removed simulated HRV gains and inflated training-effect estimates. Your numbers now reflect real measurements only.
- Rebuilt the first-day experience so you get clear guidance even before a baseline is established.
- New home screen follows a simple flow: Status — Cause — Action — Result.
- Apple Watch and iPhone now show the same sync, baseline, and data status. No more mismatches.
- Onboarding now completes the full permission loop (Health, notifications, Apple Watch) in one clear flow.
- Added a 7-day free trial so you can explore all premium features.
- Added 30- and 90-day premium trend views to see your recovery over time.
- Added a weekly recovery report summarizing your week.

Thank you for using Tuning. Your feedback shapes every update.

### 1.1.4 — 2026-07-28

What’s New

• Improved data syncing between iPhone and Apple Watch
• Fixed missing HRV data and incorrect connection-status displays
• Improved baseline-building progress and offline data handling
• Added app version and connection information to Apple Watch settings
• Enhanced overall stability and user experience

### 1.1.3 — 2026-07-26

What’s New in Version 1.1.3

• Added manual and pull-to-refresh Health data updates
• Added sync progress, last update time, and retry prompts
• Improved HRV data reliability, multilingual experience, and overall stability

### 1.1.2 — 2026-07-19

What’s New in Version 1.1.2

Added German, French, Traditional Chinese, Korean, Portuguese, Japanese, and Spanish
Added in-app language selection with system-language support
Improved localization across iPhone, Apple Watch, widgets, and complications
Improved HRV status, recovery guidance, insights, and settings
Enhanced stability and overall usability

### 1.1.1 — 2026-07-07

What’s New in Version 1.1.1
Improved iPhone and Apple Watch connectivity reliability.
Fixed cases where the Watch could not fetch the latest state from the iPhone.
Enhanced Watch sync behavior with cached data when the iPhone is temporarily unreachable.
Added clearer guidance for insufficient data, baseline building, and confidence levels.
Improved HealthKit permission and empty-state guidance.
Added clearer explanations for stress alerts.
Added post-breathing-session feedback with before-and-after heart rate changes.
Improved offline status and last updated time on Apple Watch.
Refined complication update timing and freshness indicators.
Improved Pro attribution cards to better explain key stress contributors.
Updated Simplified Chinese and English localization across iPhone, Apple Watch, and complications.

## More apps by 发亮 刘

- [Goddess Light: Fill Light Cam](https://appshunter.io/ios/app/goddess-light-fill-light-cam/id6749360877)
- [Moon Phase Calendar - MondPlan](https://appshunter.io/ios/app/moon-phase-calendar-mondplan/id6758746304)
- [TaxExpat CH](https://appshunter.io/ios/app/taxexpat-ch/id6760604008)
- [Syncly: Chronotype & Energy](https://appshunter.io/ios/app/syncly-chronotype-and-energy/id6760605207)
- [HD Align: Human Design](https://appshunter.io/ios/app/hd-align-human-design/id6761535359)
- [Sigil Maker: Manifest & Focus](https://appshunter.io/ios/app/sigil-maker-manifest-and-focus/id6762600813)

All apps by 发亮 刘: https://appshunter.io/developer/1830179467

---

*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 2026-08-23.*