Safe time by skin type
Skin type
No sunscreen
SPF 30
SPF 50
Type I
Very fair, always burns
59m
5h 24m
6h 58m
Type II
Fair, usually burns
1h 28m
8h 3m
10h 24m
Type III
Medium, sometimes burns
2h 56m
16h 6m
20h 47m
Type IV
Olive, rarely burns
4h 31m
24h 46m
31h 59m
Type V
Brown, very rarely burns
5h 53m
32h 12m
41h 35m
Sea level, on land, UV held at 1. Sunscreen is counted the way most people apply it (about half the tested amount, roughly the square root of the SPF). Whatever the table says, reapply at least every 2 hours. Snow, sand and water reflect UV and shorten these times. Not medical advice.
What to do at UV 1
You can safely enjoy being outside. Wear sunglasses on bright days, and protect your skin if you burn easily or are near snow or water.
Get a time for your skin, right now
Daisy reads the live UV where you are, follows how it changes through the day, and counts down your safe time for your skin type and sunscreen.
Open DaisyDaisy on your phone
Scan to open Daisy on your phone. The iPhone and Android apps, with a lock-screen countdown and a real alarm, are on their way.
Other UV levels