Gnomon — Solar Hours & Compass

Gnomon is a clock and alarm that runs on the sun. Set an alarm once. Dawn, sunrise, midday, sunset, or any marker you define is computed from the sun's position at your exact location, entirely on your device. Travel to another city or time zone and your alarms move with you; there's nothing to reset. YOUR MARKERS, YOUR RULES • Every marker is a rule over the sun's geometry: a twilight angle, sunrise or sunset, shadow length, an offset from another marker, or a fraction of the day or night • Rename, retune, add or delete any of them • Use it for golden-hour reminders, sunrise routines, seasonal "solar hours", or any other moment tied to the sun ALARMS THAT FOLLOW YOU • Per-marker alarms with countdown alerts and a choice of sounds • Times recompute automatically as your location changes • Siri Shortcuts can turn any marker into a real Clock alarm that rings over silent mode, and Siri can tell you today's times ON YOUR WRIST AND HOME SCREEN • Apple Watch app with today's markers and a live countdown to the next one • Complications in circular, corner, rectangular and inline styles: show whatever is next, or pin a marker such as Sunrise to its own slot • Alarms on the watch show the marker's own symbol and time • Home Screen widgets for the next marker and the whole day DIRECTION AND PLACE • Great-circle compass pointing to any place you search for or bookmark, with its shortest-path direction and distance over the globe • Tap anywhere on the map to see that day's times there • Flight mode estimates your position between two airports and shows the times where you are in the air • Share a location from a maps app to see its times • Border-crossing tool shows how much of a US driving route falls outside your start and end areas PRIVATE BY DESIGN No account, no analytics, no ads. Solar times are calculated on your device and work offline.