Sun Session calculates your personal sun-protection window - skin type × live UV × SPF - and sends a push notification exactly when protection runs out, with the real UV level at that moment. No app, no account: it runs from any of 420+ city pages on uvindex.now. Also on board: a live UV checker in 4 languages (EN, ES, FR, DE), a sunburn calculator, tomorrow's UV, and free classroom materials that replace EPA's retired SunWise program.

Hey everyone! 👋 I built UV Index Now because I noticed something weird — people check the weather every day, but almost nobody checks the UV. And UV is what actually burns your skin. The idea was simple: make checking the UV as fast as checking the temperature. Open the site, see your number, know what protection you need. Done. What I'm most proud of is the Sunburn Calculator, select your skin type, and it tells you exactly how many minutes until you burn at the current UV level. It's the thing I wish I had before every beach trip. The site covers 335+ cities worldwide, runs on live data, and works as a home screen app. Built it as a solo project on the .now TLD (backed by Amazon Registry) because the domain says exactly what the tool does. Would love your feedback, especially on what features you'd want next. UV alerts? More cities? A Wear-this-today recommendation? Let me know 👇

Built this solo from the Netherlands because every "UV app" wanted an account, an install and my location 24/7. Sun Session needs none of that - pick your skin type on a city page, allow one notification, done. Ask me anything about the burn-time math (Fitzpatrick × live UV × SPF)

UV Index Now

Get pinged the moment it's time to reapply sunscreen

Get pinged the moment it's time to reapply sunscreen