Privacy Policy

Last updated: May 31, 2026

OpenSleep is built from the ground up as a fully private, offline, 100% on-device sleep tracking app. We believe that your personal health and sleep metrics belong solely to you.

1. Zero Data Collection

OpenSleep does not operate any cloud servers, databases, or analytics pipelines. All biometric logs, movement telemetry, decibel records, and sleep logs remain isolated on your physical smartphone storage.

2. 100% Local AI Inference

Your interactions with the localized Gemma 4 AI Sleep Coach are computed locally using optimized on-device LiteRT-LM models. No text prompts, context windows, or chat records are ever transmitted over the internet.

3. System Integrations

OpenSleep syncs directly with native platform APIs (Apple HealthKit on iOS and Google Health Connect on Android). These transfers are executed purely local-to-local on your hardware, governed by native OS sandboxes and permissions.

4. No Wearable Required

OpenSleep uses your device's built-in accelerometer and sound sensors. There is no external wearable connection or communication through third-party cloud bridges, keeping your network footprint clean.