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Find your sun
Solar Rhythm uses your location to calculate today's solar times for your place — dawn, sunrise, noon, sunset, dusk, and more.
Tap Allow location to begin.
Or choose a test location
Your preferences
These shape wake guidance and evening wind-down cues. Lifestyle guidance only.
NOW
Current guidance
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Week rhythm
Tap a day to expand its times. Tap again to close. Export week creates a calendar file for unmarked cues.
Settings
Test locations
Browser notifications
Off
Optional. Up to 4 reminders per day: morning light, activity, sunset, and sleep preparation. Requires permission. No accounts or push servers.
Calendar marks
Clears on-calendar marks in the app (and remembered exports). Does not change your phone calendar by itself.