# Nocturne: HRV & Sleep — Sync Eight Sleep HRV to Health

> Syncs smart mattress HRV and sleep data to Apple Health. (iPhone/iPad app by TEK Strategies LLC.)

- Source: https://appshunter.io/ios/app/nocturne-hrv-and-sleep/id6790172802 (this page in markdown: same URL + `.md`)
- Developer: [TEK Strategies LLC](https://appshunter.io/developer/6790172804)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Rating: 4.80/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 26.0 · 3 MB
- Languages: American English
- Released: 2026-08-13
- Data updated: 2026-09-09
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/nocturne-hrv-and-sleep/id6790172802/reviews.md

## What is Nocturne?

Nocturne gives you a detailed view of every night on your Eight Sleep mattress — and exports that data to Apple Health, including the one metric your mattress never syncs on its own: HRV. 

EXPORT TO APPLE HEALTH 
Your smart mattress doesn't natively export HRV. Nocturne fills that gap, with two modes:
• Full Time Series — ~70–100 individual HRV readings taken every 5 minutes through the night, the same granular format Apple Watch uses.
• Computed Average — a single nightly HRV value that matches the number in your sleep app exactly.
Export HRV on its own, or everything: heart rate, resting heart rate, respiratory rate, and sleep stages.

AUTOMATIC MORNING SYNC
Nocturne quietly syncs each morning, so your data is in Apple Health before you open your recovery app.

WORKS WITH YOUR RECOVERY APPS
Bevel, Athlytic, and similar apps calculate readiness and recovery from Apple Health data. Nocturne makes your HRV and sleep stages available to all of them — automatically.

BULK BACKFILL
Just got Nocturne? Export months of Eight Sleep history in one tap. Set a date range and backfill everything at once – perfect for tracking trends to get the most out of recovery apps.

EVERY NIGHT, FULLY ANALYZED
Your latest night greets you the moment you open the app — HRV, sleep duration, resting heart rate, and breathing rate at a glance, with a color-coded sleep-stage hypnogram. Open any night for the full picture: HRV charted across your sleep, deep/REM/light/awake stages, heart rate, respiratory rate, and room-vs-bed temperature curves your sleep app never charts for you.

TRENDS OVER TIME
Track your average HRV, resting heart rate, and sleep duration across 7, 30, or 90 days. Watch your recovery baseline move — and know whether it's heading the right way.

PRIVATE BY DESIGN
Nocturne runs no servers. Your credentials go directly to your sleep account, your session token lives only in your device's encrypted Keychain, and everything is processed on-device before it's written to Apple Health. Nothing is collected, tracked, or stored anywhere else.

FREE TO START
Sync 7 nights free — no time limit. Nocturne Pro unlocks unlimited syncs, automatic morning sync, the full 5-minute HRV time series, bulk backfill, and detailed night analysis.

Nocturne Pro is available monthly, annually, or as a one-time Lifetime purchase. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. Payment is charged to your Apple Account, and you can manage or cancel anytime in your account settings.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://tek-strategies.com/nocturne/privacy

Nocturne accesses your own sleep data on your behalf. It is not affiliated with, endorsed by, or sponsored by Eight Sleep. Eight Sleep is a trademark of Eight Sleep, Inc. Apple Health is a trademark of Apple Inc.

## Key features

- HRV export to Apple Health
- Detailed nightly sleep analysis
- Automatic morning sync
- Integration with recovery apps
- Bulk data backfill
- Trends over time tracking

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Nocturne Pro – Monthly | $3.99 | per month |
| Nocturne Pro – Annual | $24.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Nocturne Pro – Lifetime | $49.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/nocturne-hrv-and-sleep/id6790172802/reviews.md

### 5/5 — Works well

*2026-08-21*

Does exactly what it says

### 5/5 — Works great

*2026-08-20*

Finally allows me to not have to wear my Apple Watch to bed to get recovery data from my Eight Sleep. Solid app and bulk historical upload process was really slick

### 4/5 — Eight sleep / Bevel compatible

*2026-08-19*

Finally able to see all my HRV data and sleep info right in the apple health app.  Once it’s there, my other apps like Bevel import the data automatically. Sweet!

## Frequently asked questions about Nocturne

### What is Nocturne?

Nocturne is a health and fitness app designed to sync detailed sleep data, including heart rate variability (HRV), from your Eight Sleep mattress to Apple Health. It offers in-depth nightly analysis and trend tracking.

### Does Nocturne have ads?

No, Nocturne does not contain advertisements. The app is free to start with optional premium features available through subscription.

### How much does Nocturne Pro cost?

Nocturne Pro offers monthly ($3.99/P1M), annual ($24.99/P1Y), and lifetime purchase options. Subscriptions automatically renew unless canceled at least 24 hours before the current period ends.

### What data does Nocturne export to Apple Health?

Nocturne exports HRV, heart rate, resting heart rate, respiratory rate, and sleep stages. It offers both a full time series of HRV readings and a computed nightly average.

### Can I use Nocturne with other sleep apps?

Yes, Nocturne works with recovery apps like Bevel and Athlytic by making your HRV and sleep stage data available in Apple Health, which these apps then use.

### Is my data private with Nocturne?

Nocturne is designed for privacy, processing all data on-device before writing to Apple Health. Your credentials are sent directly to your sleep account, and session tokens are stored securely in your device's encrypted Keychain.

### How often is Nocturne updated?

The latest version of Nocturne, 1.0.1, was released on August 18, 2026, indicating recent updates. The app is generally updated to ensure compatibility and introduce new features.

### What devices does Nocturne support?

Nocturne currently supports iPhone devices. It is designed to integrate with your Eight Sleep mattress data and sync to Apple Health.

## Version history (last 3 releases)

### 1.0.2 — 2026-09-08

Bug fixes, performance improvements, and behind-the-scenes maintenance

### 1.0.1 — 2026-08-18

-Automatic sync now brings in your most recent nights each morning and no longer performs historical imports — use Bulk Export for older data. 
-Sync status and the sync log now show exactly which nights were written.
-Bug fixes and reliability improvements.

### 1.0 — 2026-08-13

No release notes.

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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 2026-09-09.*