An app by COOK
Daylight
Know exactly when the sun rises, when the light turns golden, and when it's safe to breathe deep — all in one place.
Everything the sky is doing today
Four readings, one screen — for wherever you are or wherever you're headed.
Every phase of light
Sunrise, sunset, dawn, dusk, golden hour, solar noon and total daylight — for any spot on Earth, down to your local time zone.
A full year, visualized
An interactive chart of daylight across the year. Tap any two dates to compare them side by side, down to the minute.
Know before you go
An estimated peak UV index based on solar elevation and altitude, so you can plan sun protection ahead of time.
Breathe easy
An hour-by-hour AQI chart plus a live reading from the nearest station — color-coded on the EPA's Good–Hazardous scale.
Available on Google Play
Scan the code, or use the button, to install Daylight — free, no account needed, no data collected.
Get it on Google PlayEnjoying Daylight?
It's built and kept up by one person. If it's useful to you, a coffee goes a long way.