AI in Action · SleepCheck
Privacy
What stays on your device, what we do not collect, and how page analytics work.
On-device preferences
Mix levels, scenes, timer settings, and streak data stay in this browser's local storage. There is no account and no cloud sleep database. Uninstalling the app or clearing site data removes those preferences.
Audio and stories
Soundscapes and curated story narrations play from bundled audio cached on this device. AI or custom stories fall back to your device's built-in speech synthesis — not a live cloud narration API. SleepCheck does not use a microphone or wearable to track sleep.
Analytics
The live site at sleepcheck.weidong-shi.com may record privacy-friendly page views via Vercel Analytics. Sleep preferences and mix data are not sent as analytics events.
Wellness framing
SleepCheck is a relaxation tool for general wellness. It is not medical advice and does not diagnose or treat sleep disorders.
Related
Parent site: weidong-shi.com. Product background: About.