Sunhaven: UV & Sunburn Timer
Burn time & SPF reminders
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Know YOUR safe time in the sun — not just the UV number.
Sunhaven is completely free. Every feature — the burn timer, the forecast, the widgets, the alerts — with no subscription, no ads, no account, and no tracking of any kind.
The UV index says 7. But what does that mean for you? Sunhaven turns the forecast into the answer that matters: how long your skin can safely be in the sun. Pick your skin type and your usual SPF, and Sunhaven estimates your personal burn time from the live UV forecast for wherever you are.
THE SUN SESSION
Tap Start when you head outside. A live countdown ring tracks your remaining sun time against the changing hourly UV — not a single static number. You'll get a nudge when it's time to reapply sunscreen, a warning as you approach your limit, and a calm summary of your day in the sun when you're done. Went for a swim? One tap shortens your reapply timer and adjusts your budget.
BEFORE THE PEAK, NOT AFTER
Sunhaven warns you about an hour before UV peaks on high-UV days, so you can plan shade, sunscreen, and swims — not regret them.
WHAT'S INSIDE
• Personal burn-time estimates for six skin types and any SPF
• Live Sun Sessions with reapply reminders and limit warnings
• Sessions keep counting accurately while your phone is locked or in your pocket
• Live Activity on the lock screen and Dynamic Island
• Log a session you forgot to start, or correct one you already saved
• Hourly UV today, plus a full 7-day UV forecast
• Daily peak-UV alerts with quiet hours
• Home-screen and lock-screen widgets with your safe time
• History of your sun sessions with weekly totals
• Works with your location, or any city you choose
PRIVATE BY DESIGN
No account. No ads. No tracking. Everything is computed on your device, and your location is used only to fetch the local UV forecast.
Weather data provided by Apple Weather.
Estimates are based on WHO UV guidance and typical skin responses. Individual sensitivity varies. Sunhaven is not medical advice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The Sun Session screen has been rebuilt around one idea: stepping into the shade should take one tap, wherever you are.
• Pause from the lock screen. Tap pause on the Live Activity without opening the app. Your burn time stops the moment you tap, not the next time you open Sunhaven.
• A live countdown. Hours, minutes and seconds, so one glance tells you whether it is running or paused.
• Every action says what it will do. "I'm in the shade" pauses your burn time. "I swam" tells you it costs 20% of your remaining time — before you tap it.
• Undo. Tapped "I reapplied" or "I swam" by mistake? Both can be taken back now.
Also fixed: pausing a session no longer cancels your reapply reminder. Sunscreen wears off in the shade too, so that alert now survives the pause.
The developer, Nadi Mertan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Nadi Mertan
- Size
- 1.7 MB
- Category
- Weather
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- Copyright
- © 2026 Nadi Mertan
