# Open Sleep-offline sleep track — offline sleep tracker&AI coach

> offline sleep tracker&AI coach (iPhone/iPad app by Yuan Qian.)

- Source: https://appshunter.io/ios/app/open-sleep-offline-sleep-track/id6775201826 (this page in markdown: same URL + `.md`)
- Developer: [Yuan Qian](https://appshunter.io/developer/1894474763)
- Category: Health & Fitness, Utilities
- Price: Free
- Age rating: 12+
- Requires: iOS 26.5 · 50 MB
- Languages: American English, French (France), German (Germany), Italian, European Portuguese, European Spanish
- Released: 2026-06-09
- Data updated: 2026-07-19
- User reviews in markdown: https://appshunter.io/ios/app/open-sleep-offline-sleep-track/id6775201826/reviews.md

## What is Open Sleep?

OpenSleep is the ultimate offline, privacy-first sleep tracker and local AI sleep coach designed to help you understand your sleep patterns without ever compromising your personal data.

100% PRIVATE & ON-DEVICE
Your sleep is personal. OpenSleep processes all motion sensor data (accelerometer, gyroscope) completely locally on your device. Zero servers, zero trackers, and zero external APIs. 

LOCAL AI SLEEP COACH
Ask questions about your sleep, circadian rhythm, and morning fatigue to a fully on-device Gemma 4 AI Large Language Model. Experience instant, helpful responses completely offline with zero data leaving your device.

HEALTH SYNCHRONIZATION
Seamlessly records your sleep cycles and stages (Awake, REM, Light, Deep) and synchronizes them directly with Apple Health. 

FEATURES:
• Advanced motion-based sleep cycle tracking
• Interactive, gapless sleep stage ring charts
• Local, serverless AI sleep coach powered by on-device LLMs
• Detailed sleep history breakdown and trend analysis
• Fully localized in English, Spanish, Portuguese, German, French, and Italian
• 100% serverless, private, and open-source

Take control of your sleep quality with modern aesthetics and absolute data ownership. Download OpenSleep today.


## Version history (last 3 releases)

### 1.0.2 — 2026-07-01

Improved sleep tracking

### 1.0.1 — 2026-06-24

Improved sleep tracking

### 1.0 — 2026-06-09

No release notes.

## More apps by Yuan Qian

- [LLM Hub-Local AI assistant](https://appshunter.io/ios/app/llm-hub-local-ai-assistant/id6762511820)

All apps by Yuan Qian: https://appshunter.io/developer/1894474763

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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 2026-07-19.*