Sync your biology with the natural light cycle
A local-first circadian rhythm app. Solar-aware vitamin D tracking, blue-light protection, and focus mode — all on your device, encrypted, with zero telemetry.
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Solar engine
Real-time sun position, vitamin D window, and UV exposure for your exact location.
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Blue light filter
System-wide evening overlay that dims blue wavelengths without darkening your screen.
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Solar alarms
Wake with sunrise. Alarms that fire at astronomically-computed times, not arbitrary clocks.
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Focus mode
Block distracting apps during chronotype-aligned deep-work windows.
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Circadian score
A 0-100 daily rating across four pillars: light, sleep, timing, and recovery.
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Private by design
AES-GCM encryption at rest. No accounts, no analytics, no ad IDs, no server.