Sleep Stages: Smart Alarm

Sleep Cycle Lite is a private, on-device sleep tracker with a smart alarm that wakes you at a lighter moment — no account, no subscription required, and your audio never leaves your iPhone.99 purchase — no recurring bill, no 5am upsells, no sign-in wall. WAKE UP GENTLY
The smart alarm watches for a lighter moment inside your wake window and rings then, so mornings feel less abrupt. AUTOMATIC SLEEP-STAGE ESTIMATES
Your iPhone listens for sound and motion overnight and estimates light, deep, and REM stages — all processed on-device using Apple's Sound Analysis and Core ML. Nothing is uploaded. WHAT YOU GET FREE
- Overnight tracking with a live sleep view
- Your most recent night's summary
- A single smart-alarm wake window
- Manual bedtime entry

UNLOCK PRO
- Unlimited night history and trends
- On-device snore detection
- Advanced smart-alarm options
- Optional, opt-in sync to Apple Health

PRIVATE BY DESIGN
- No account, ever
- No cloud upload and no cloud inference — all analysis runs on your iPhone
- Works without an Apple Watch

A NOTE ON ACCURACY
Sleep stages are informational estimates derived from phone microphone sound and device motion. They are less precise than a clinical sleep study. Sleep Cycle Lite is not a medical device and does not diagnose, treat, or monitor any condition. Please consult a physician for any sleep concerns.

PRO SUBSCRIPTION
Unlock all Pro features with an auto-renewable subscription:
- Weekly: $0.99 per week
- Monthly: $3.99 per month
- Annual: $19.99 per year
Payment is charged to your Apple Account at confirmation of purchase. Your subscription automatically renews unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your account Settings.

Privacy Policy: https://leexuanxuan95-dev.github.io/sleepcyclelite/privacy.html
Terms of Use (EULA): https://leexuanxuan95-dev.github.io/sleepcyclelite/eula.html