Your light today
The glyph fills as your time outside adds up. A short sentence tells you what it means right now: go out, cover up, or you have had enough.
For iPhone and Apple Watch
Understand your relationship with light.
Foreglow shows how much daylight and UV you have had today, when to protect your skin and when to step outside for more.
Coming soon to theApp Store
One look tells you where you stand
Light does you good, and too much of it does not. Foreglow keeps the balance for you, so you do not have to read UV tables or count minutes.
Made for you
Foreglow counts with your skin type, the UV where you are and the sunscreen you log, and reminds you when it is time to reapply.
Your patterns
Insights keeps your sessions, streaks and places, so you can see how much light your weeks and months really hold.
Two modes, for every season
Bright days
Protect
When UV is strong, Foreglow tracks your exposure and points you to shade, sunscreen or a break before it gets too much.
Grey days and winter
Gather
When light is scarce, it helps you catch what is there, with a simple daily goal for your time in daylight.
Auto switches between the two as the conditions change.
Today, Forecast, Insights
Three tabs: where you stand now, what the light will do next, and how your weeks add up.
Today
Tap Going out when you head outside. Foreglow counts your light, tracks your sunscreen and tells you when you have had enough.
Forecast
The day as one curve: when the light builds, peaks and fades. Plan a walk or a run for the hours that suit you, today and all week.
Insights
Your sessions, streaks and places over time, and a weekly recap you can share.
On your wrist, on your Lock Screen
Start a session and log sunscreen from your Apple Watch. Glance at your light in complications, Home Screen widgets and a Live Activity while you are out, without opening the app.
Private by design
No account, no ads, no tracking. What you log stays on your devices and in your own iCloud. Read the privacy policy
Questions and answers
What is Foreglow?
Foreglow is a light guide for iPhone and Apple Watch. It follows the daylight and UV around you and the time you spend in it, and tells you in plain words what that means for today: when to protect your skin, when you have had enough, and when it is worth stepping outside for more.
How does Foreglow know how much light I have had?
You start a session when you go outside, on your iPhone or your Apple Watch. Foreglow combines the session time with the UV level at your location, your skin type and any sunscreen you log. The glyph on the Today screen fills as your light for the day adds up.
What are the Protect and Gather modes?
Protect is for bright days: Foreglow tracks your sun exposure and reminds you about shade, sunscreen and reapplying. Gather is for dull days and winter: it helps you reach a daily goal of time in daylight. Auto picks the right mode for the conditions.
Does Foreglow work on Apple Watch?
Yes. The Watch app shows the day's light on a dial, lets you start a session and log sunscreen from your wrist, and offers complications for your watch face. On iPhone there are also widgets and a Live Activity for the Lock Screen and Dynamic Island.
Where does the UV data come from?
UV and sunshine forecasts come from Open-Meteo. Sunrise, sunset and the position of the sun are calculated on your device.
Do I need an account? What happens to my data?
No account and no sign-up. What you log stays on your devices and in your own iCloud. Foreglow has no ads, no analytics and no tracking. Data read from Apple Health stays on your iPhone.
Is Foreglow a medical app?
No. Foreglow gives everyday guidance for light and sun. It does not diagnose, treat or prevent any condition and does not replace advice from a doctor.
What does Foreglow cost?
Foreglow is free to download and use. Foreglow Pro is optional and adds the forecast for the coming days, saved places, a longer history in Insights and more widgets and watch complications.
When is Foreglow available?
Foreglow is coming to the App Store soon, for iPhone and Apple Watch.
Live better with light.
Coming soon to theApp Store
Foreglow gives guidance for everyday light, not medical advice.