UVSun: UV Index & Sunscreen

Know how much safe sun you have left today - personalized to your skin, and honest about it.

UVSun reads the UV index for exactly where you are and turns it into a personal daily safe-sun budget: an amount set by your skin type that sunlight spends and sunscreen slows. Instead of a vague guess, you get a clear number - and UVSun shows its work.

WHY UVSUN IS DIFFERENT
- It shows its work. See your remaining safe-sun time, how much of your daily dose you have used, and how fast you are spending it - not a black-box countdown. The budget is set with a safety margin, on purpose.
- Honest about sunscreen. When you log SPF, UVSun credits realistic in-use protection and then eases off its assumption over time - it reminds you to reapply instead of pretending the sunscreen lasts forever.
- It keeps up with the sun. A session re-rates as the sun climbs and as your sunscreen ages, so the number actually moves - it never freezes at what it said when you started.
- Backed by real science. A Science page cites peer-reviewed sun-safety research and is upfront about what the evidence does and does not show.

HOW IT WORKS
- Allow location and UVSun looks up the UV index for where you are, with your place name.
- Do a quick skin-type check - a private camera color scan or a short quiz reads your eye, skin, and hair color to estimate your Fitzpatrick type (I-VI).
- Watch your remaining safe-sun time and daily dose budget update through the day.
- Tap "I'm in the sun" to track a session, and get a shade heads-up before you overdo it plus a reminder to reapply sunscreen.

WHAT'S INSIDE
- The current UV index for your exact location, with place name
- Personalized safe-sun time and a daily dose budget by skin type
- Skin-type estimate from a private camera color scan or a quick quiz
- SPF-aware timing with honest reapply reminders
- Sun sessions with history and weekly stats
- A whole-day, hour-by-hour UV forecast in WHO color bands, with a "now" marker to plan around the peak
- Shade, reapply, and "UV is climbing" alerts
- A Science page citing peer-reviewed sun-safety research
- 10 languages, works offline with your last reading, colorblind-safe UV labels

PRIVATE BY DESIGN
- No account, no sign-up, no cloud.
- Your location is used only to look up the UV index and your place name - never for ads, and never shared with advertisers.
- Your skin-scan photo is never saved or uploaded.

UVSun is ad-supported. A one-time purchase removes all ads - every feature is available either way.

UV data by currentuvindex.com (CC BY 4.0).

UVSun provides general wellness information, not medical advice. It does not diagnose, treat, or prevent any condition, including skin cancer. Burn-time estimates are approximations - when in doubt, seek shade. Consult a healthcare professional for medical concerns.

Recent changes:
The History tab now goes back further than a week. The arrows above the chart step the window back seven days at a time, and the chart, the weekly stats and the session list all move with it - back to your very first record.

Settings moved into the bottom tab bar, so it is one tap from anywhere instead of a gear in the corner of the home screen. The bar is opaque now too, so the labels stay legible whatever colour the sky is.

Thanks for using UVSun!