Circadian AI Sleep & Rhythm

Circadian AI reads your body clock — not your data.

It turns your Apple Health sleep and your local sunrise into a personal circadian phase, then builds one simple daily plan: when to get morning light, cut caffeine, eat, do NSDR, and wind down for sleep.

Your daily plan is free. Everything runs 100% on your iPhone. No account. Works offline — nothing about your health ever leaves your phone.

FREE, ALWAYS
• Your personal circadian phase, recalculated every day
• Morning light window — when to step outside for the biggest shift
• Caffeine cut-off — timed to protect tonight's sleep
• Meal & movement timing aligned to your rhythm
• NSDR / wind-down prompts to help you downshift in the evening
• Chronotype-aware — early bird or night owl, the plan adapts
• Today's full protocol timeline and tomorrow's preview
• The onboarding questionnaire and the plan it produces

CIRCADIAN AI PLUS
• Insights (Plus) — multi-night correlations between your rhythm sync and your HRV and sleep efficiency, plus your weekly adherence history
• Background reminders (Plus) — protocol nudges delivered while the app is closed. The plan itself is always on screen for free; only proactive delivery is part of Plus.

WORKS WITH APPLE HEALTH
Connect Sleep and Heart Rate data (optional) and Circadian AI does the rest — reading trends on-device to fine-tune your timing every day.

WHO IT'S FOR
• Anyone rebuilding a sleep schedule or fixing a late body clock
• Shift workers, travelers, and students out of sync
• Longevity and morning-routine fans who want signal, not noise

PRIVATE BY DESIGN
No email. No cloud profile. No tracking. You can use the full daily plan without handing your data to anyone.

Circadian AI is built on published circadian-science principles. It is not medical advice and does not diagnose or treat any condition. Consult a healthcare professional about sleep or health concerns.

MEMBERSHIP
Circadian AI Plus is an optional subscription: a weekly plan with a 3-day free trial, and an annual plan. The daily protocol is free and does not require a subscription. Payment is charged to your Apple Account at confirmation of purchase. Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Any unused portion of a f