# OpenSleep: Sleep Tracker & AI — Offline AI coach, no wearable

> Offline, privacy-first sleep tracker and local AI sleep coach. (iPhone/iPad app by Yuan Qian.)

- Source: https://appshunter.io/ios/app/opensleep-sleep-tracker-and-ai/id6775201826 (this page in markdown: same URL + `.md`)
- Developer: [Yuan Qian](https://appshunter.io/developer/1894474763)
- Category: Health & Fitness, Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 12+
- Requires: iOS 26.0 · 73 MB
- Languages: American English, European Spanish, Italian, German (Germany), European Portuguese, French (France)
- Released: 2026-06-09
- Data updated: 2026-10-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/opensleep-sleep-tracker-and-ai/id6775201826/reviews.md

## What is OpenSleep?

OpenSleep tracks your sleep stages without a watch or ring, and explains them with an AI sleep coach that runs entirely on your iPhone.

TRACK SLEEP WITHOUT A WEARABLE
Choose how your phone listens to the night:
• Sonar (contactless): leave your iPhone on the nightstand. OpenSleep uses ambient sound levels to pick up sleep cues. Raw audio is never recorded or stored.
• Mattress mode: place your iPhone flat on the mattress next to your pillow and let the motion sensor follow your movement.

SEE EVERY STAGE OF YOUR NIGHT
• Awake, REM, light and deep sleep, shown on a stage ring and a full-night sleep pattern chart
• Bedtime, wake-up time and total sleep for every session
• History with day, week, month and year views to spot trends

AN AI SLEEP COACH THAT STAYS ON YOUR PHONE
Ask about your sleep, your routine or why you wake up tired. The coach is a large language model that runs on your device, so your questions and answers are never sent to a server. Download the model once, then chat even with no connection.

WORKS WITH APPLE HEALTH
OpenSleep writes your sleep sessions and stages to Apple Health and can show sleep already recorded there.

PRIVATE BY DESIGN
• No account and no sign-up
• Sleep analysis happens on your iPhone
• Open source: anyone can read the code

Available in English, Spanish, Portuguese, German, French and Italian.

Sleep tracking is free. The AI Sleep Coach is a one-time purchase with no subscription.

OpenSleep is a wellness tool, not a medical device. Talk to a doctor about any sleep or health concerns.

## Key features

- Offline sleep tracking
- Local AI sleep coach
- Apple Health synchronization
- Sleep cycle and stage analysis
- Privacy-first, serverless design
- Detailed sleep history

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| OpenSleep Lifetime Premium | $2.99 | one-time |


## Is OpenSleep safe?

Not enough ratings yet to assess OpenSleep.

## Is OpenSleep legit?

OpenSleep: Sleep Tracker & AI has limited verification signals. The AppsHunter Legitimacy Score for OpenSleep is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/opensleep-sleep-tracker-and-ai/id6775201826/reviews.md

### 5/5 — Best sleep app implementation I’ve seen.

*2026-09-28*

I love this apps freemium approach to a simple sleep tracker that syncs with the health app.  It has an optional paid ai chat to get deeper sleep insights and has a currently active developer adding more features and functionality.

**Developer response:** Thanks!

## Frequently asked questions about OpenSleep

### Does Open Sleep have ads?

No, Open Sleep is ad-free. The app is designed with a privacy-first approach and does not contain advertisements.

### What devices does Open Sleep support?

Open Sleep is available on iPhone and iPad devices. It utilizes motion sensor data from these devices for tracking.

### How accurate is Open Sleep's sleep tracking?

Open Sleep uses advanced motion-based tracking to record sleep cycles and stages, including Awake, REM, Light, and Deep sleep. It synchronizes this data with Apple Health for a comprehensive overview.

### Can I ask Open Sleep questions about my sleep?

Yes, Open Sleep features a local AI sleep coach powered by an on-device LLM. You can ask it questions about your sleep patterns, circadian rhythm, and fatigue offline.

### Is my sleep data safe with Open Sleep?

Absolutely. Open Sleep is 100% private and serverless. All sleep data is processed locally on your device, with zero servers, trackers, or external APIs involved.

### What languages does Open Sleep support?

Open Sleep is fully localized in English, Spanish, Portuguese, German, French, and Italian, making it accessible to a global user base.

### How often is Open Sleep updated?

The latest version of Open Sleep is 1.0.5, and it was last updated on September 21, 2026. Updates typically focus on improving tracking accuracy and AI coach capabilities.

### What is the age rating for Open Sleep?

Open Sleep has an age rating of 12+. This is based on the app's content and features, which are suitable for users aged 12 and above.

## Version history (last 5 releases)

### 1.0.6 — 2026-10-20

• Updated LiteRT on-device AI runtime
• Optimizations for iPhone Duo

### 1.0.5 — 2026-09-21

Optimizations for ios 27 and ipados 27

### 1.0.4 — 2026-09-15

Imporved sleep tracking

### 1.0.3 — 2026-09-13

Improved sleep tracking

### 1.0.2 — 2026-07-01

Improved sleep tracking

## Apps similar to OpenSleep

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Wired – Track your Caffeine](https://appshunter.io/ios/app/wired-track-your-caffeine/id6760977333) | — | Free | Health & Fitness |
| [Night Ledger](https://appshunter.io/ios/app/night-ledger/id6803367661) | 5.0 (6) | Free | Health & Fitness |
| [TrackScore](https://appshunter.io/ios/app/trackscore/id6787106921) | — | Free | Health & Fitness |
| [Twilight: simple sleep tracker](https://appshunter.io/ios/app/twilight-simple-sleep-tracker/id6757098758) | — | Free | Health & Fitness |
| [ScalePal: Weight Tracker](https://appshunter.io/ios/app/scalepal-weight-tracker/id6752838575) | 5.0 (1) | $1.99 | Health & Fitness |
| [SleepViz: Sleep Recorder](https://appshunter.io/ios/app/sleepviz-sleep-recorder/id6761079940) | — | Free | Health & Fitness |

## More apps by Yuan Qian

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

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

---

*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 2026-10-25.*