Sol Clock

About the App

Time Anchored to
the Sun, Not the Clock

Sol Clock shows you where the sun actually is in the sky at every moment of the day. One full rotation of the hand equals one solar day, anchored to solar noon — not the arbitrary midnight of the modern clock.

The St. Mark's face is inspired by the great astronomical clocks of Venice and Prague: a 24-hour dial with a zodiac ring, orbital ring, and a live earth at the center showing day and night in real time. In version 1.2, the orbital ring — the band the sun travels along — has become a full color temperature wheel, each hour shaded with the actual sky color for that time of day at your location.

No account required. No advertising. No data collection. Your location is used only on-device for solar calculations and is never transmitted or stored.

Features

What's Inside

• St. Mark's clock face — 24-hour astronomical dial inspired by the great medieval clocks of Venice and Prague; one rotation equals one solar day
• Sky color temperature ring — the orbital ring shows a full 24-hour color wheel, each segment colored with the actual sky color for that time of day (deep violet at nautical twilight, warm gold at sunrise, pale blue at midday); computed dynamically from today's sunrise and sunset at your location
• Dynamic sky gradient — the clock background cross-fades throughout the day to reflect current sky conditions
• Color temperature readout — live display of correlated color temperature and phase name (e.g. "~4,800 K · Morning Light") below the clock
• Solar time — true solar time displayed alongside standard, daylight, and UTC
• Sky map — live sun position, lunar phases, moonrise/set, day/night terminator, constellation boundaries
• Sun & Moon compass — rotating magnetic compass showing live solar and lunar direction
• Solar alarms — notifications for Nautical Dawn, Civil Dawn, Sunrise, Golden Hour End, Morning Light, Solar Noon, Afternoon Light, Golden Dusk, Sunset, Civil Dusk, Nautical Dusk, Night, Moonrise, and Moonset
• Morning Light alarm — fires ~15 minutes after golden hour end, when the sun reaches the healthy +10° altitude window ideal for circadian light exposure
• Afternoon Light alarm — fires ~15 minutes before evening golden hour begins, marking the end of the optimal afternoon light window
• Location-aware — precise solar calculations for your exact coordinates
• Offline-capable — remembers your last known location
• Private — no analytics, no advertising, no account system