Sky Planner
Moonrise, moonset, sunset, astronomical dusk and the dark-sky window for tonight, with a score for stargazing, night hikes and photography. Lunaday+ extends it to the next 30 days and a full year of sky events.
Moon, stargazing & tides
Lunaday
A moon calendar with phases, dark-sky windows and tides, wherever you are.
Free. Lunaday+ is a $9.99 one-time purchase.
Calendar, Sky Planner and upcoming sky events.
Lunaday is a calendar built around the moon. See a drawn, phase-accurate moon for any day, find the best dark-sky window for stargazing, night hikes or photography, and check tides for more than 3,100 gauges in 116 countries, computed on your device. Your events live alongside it all, with natural-language entry like “stargaze on the next new moon.”
Worldwide tides
Tide predictions for 3,100 gauges in 116 countries, computed offline from harmonic constants. In the US, NOAA’s official predictions, plus live swell and water temperature from the nearest buoy with Lunaday+.
Widgets and languages
Home Screen and Lock Screen widgets for moon phase, calendar and events. The app is in eleven languages.
Privacy
No account and no tracking. Astronomy and computed tides run on the device; the app’s own network calls go only to NOAA and to Apple for place names.
Lunaday
iPhone & iPad. Available now. Free. Lunaday+ is a $9.99 one-time purchase.
Get it on the App Store