iCaelum

iCaelum brings the sky above you into one app: where the Sun and Moon are, when the light will be good, what the weather will do, and whether it is safe to be outside.

SKY NOW
Open the app and see your sky at a glance: whether the Sun is up and when it sets, a 24-hour light timeline with twilight and golden hour, sunrise, sunset and day length, and tonight's Moon phase with its rise and set.

SUN & MOON
• Today's Sun and Moon: position, azimuth and altitude, right ascension and declination, rise, transit and set with their directions
• Moon phase, illumination and age
• A full-year almanac for the Sun and Moon, with today highlighted
• Summer and winter solstices at their exact moment
• Blue hour and golden hour for any date
• Upcoming solar and lunar eclipses computed for your location: whether you can see them, how much is covered and a timeline of each phase

FORECASTS
Compare six weather providers in one browsable hourly table: Yr (MET Norway), SMHI, FMI, NOAA, Open-Meteo and OpenWeather. Temperature, precipitation, rain chance, cloud cover, humidity, pressure, wind and gusts, UV and more, with an AI summary of the next 24 hours.

SENTINEL
Your outdoor safety monitor: an outdoor safety index, asthma and heat risk, road safety, UV and air quality, grass, tree and weed pollen with a trend chart, and official MeteoAlarm weather warnings. Set your own thresholds and get alerted.

TRACKERS
Find the Sun and Moon with a 2D compass dial of their path through the day, or point your camera and let the AR tracker guide you with sound or vibration.

SHADOWS, WINDS & RADARS
• Shadow length and direction for any object, place and time
• Live wind flow around you and an animated 12-hour wind forecast
• Rain radars from RegnRadar, DMI, MeteoBlue and RainViewer

PROFILES
Views built for what you do: Photographer (golden and blue hours, twilight), Beach Lover (UV timeline, tanning windows, live shadow), Gardener & Farmer (frost risk, solar exposure, moon phase), Hiker (daylight and last light) and Fisherman & Hunter (solunar peaks, tides and wind).

Units follow your preference: °C or °F, m/s or mph, mm or inches.

iCaelum uses your location to calculate the sky and weather where you are. No account is needed.