UV Safety App
SunMeter
Know exactly when you are getting too much sun before your skin does.
SunMeter turns local UV data into a personal burn-time countdown, then keeps the session visible through reminders, Live Activities, and Apple Watch surfaces.
Live local UVPersonal burn timerAI skin type estimateSunscreen remindersLive ActivitiesApple Watch widgets
UV
current risk and hourly forecast
Timer
personal countdown to burn risk
Watch
widgets and wrist reminders
01 Know Burn Time
02 Watch Timer Lock Screen
03 Detect Skin Type
04 See Live Uv
05 Get Warned
01 Know Burn Time
02 Watch Timer Lock Screen
03 Detect Skin Type
04 See Live Uv
05 Get Warned
Built for real days outside
Personal burn-time estimate
SunMeter combines UV, skin type, SPF, clouds, and protective choices to show how long you can stay outside.
Live UV forecast
Current UV, peak timing, hourly shape, and the next few days are visible without digging through a weather app.
AI skin type detection
Users can pick their Fitzpatrick type manually or use an optional OpenAI-powered photo estimate during onboarding.
Reminders that match the risk
Get nudges for sunscreen reapplication, burn warnings, shade check-ins, and peak UV moments.
Lock Screen and Dynamic Island
Active sun sessions can continue as Live Activities so the countdown stays visible while the phone is locked.
Apple Watch support
A watch app and UV widgets keep local sun risk glanceable when the phone is in a bag or beach chair.
What the screenshots show
Know burn time
Personal countdown built from UV, skin type, SPF, and protection choices.
Watch timer
Lock Screen and wrist-visible sessions for active sun exposure.
Detect skin type
Optional AI-assisted personalization during onboarding.
See live UV
Hourly and daily UV context with the peak risk clearly marked.
Get warned
Sunscreen and shade notifications before risk turns into a problem.
Questions users will ask
What does SunMeter calculate?
It estimates personal time to burn from current UV, selected skin type, SPF, cloud cover, and protection choices such as hat, sunglasses, or cover-up clothing.
Does AI skin detection replace medical advice?
No. It is a personalization estimate for sunscreen timing. Users can skip it and choose their skin type manually.
Why does SunMeter use location?
Location is needed to fetch the local UV index and forecast. The app copy makes that requirement explicit during onboarding.