# UV Index, Sunburn - Zenit — Know before you burn

> Know before you burn (iPhone/iPad app by Streamlined Studios.)

- Source: https://appshunter.io/ios/app/uv-index-sunburn-zenit/id6796390858 (this page in markdown: same URL + `.md`)
- Developer: [Streamlined Studios](https://appshunter.io/developer/1802378603)
- Category: Weather, Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: Korean, Greek, Dutch, Danish, German (Germany), Romanian, Malay, Vietnamese, Norwegian Bokmål, Swedish and 16 more
- Released: 2026-08-19
- Data updated: 2026-08-25
- User reviews in markdown: https://appshunter.io/ios/app/uv-index-sunburn-zenit/id6796390858/reviews.md

## What is UV Index, Sunburn?

How long can you stay out before your skin starts to burn? Zenit answers that, in plain language, for the person actually standing there.

CLOUD IS NOT SUNSCREEN
This is the one thing almost every UV app gets wrong. Cloud scatters visible light far more than it absorbs ultraviolet — a completely overcast sky often passes 90% of the day's UV. Zenit draws what the UV would be under a clear sky right alongside what it actually is, so on a grey afternoon you can see the two lines sitting on top of each other. That is the afternoon people get caught out.

NOT JUST A NUMBER
A UV index of 7 means nothing if you don't already know the scale. Zenit tells you what it means for your skin: the band, the sky, and roughly how long you have. Six Fitzpatrick skin types, described by how skin behaves rather than by colour, and sunscreen counted at half its labelled SPF — because almost nobody applies the amount the label is measured at.

BURN TIMES THAT ERR ON YOUR SIDE
Rounded down, never up. Adjusted for altitude and for what you're standing on — snow throws back four fifths of the UV that hits it. They are estimates and the app says so.

THE WIDGET IS FREE
So is the UV index, today's hourly curve, the seven-day forecast, the sunscreen timer, and one alert a day. You should not have to pay to see a number your weather app gives away.

TIME BELONGS TO THE PLACE
Every hour, sunrise and alert is shown in the clock of the place you're looking at, not the phone in your pocket. Check the forecast for somewhere you're travelling to and it simply reads correctly.

HONEST ABOUT WHAT IT KNOWS
Every reading shows when it was taken and where it came from, and goes visibly stale. Nothing is presented as current when it is three hours old.

NO TRIAL TO FORGET ABOUT
There is no free trial that starts charging on its own. The free tier is the trial and it doesn't run out.

Zenit Pro adds a profile for everyone in the family, as many saved places as you like, your own alert threshold and quiet hours, Lock Screen widgets, and sun exposure history.

Search any town without granting location access. No ads. No tracking. No third-party analytics.

UV data from Open-Meteo, using the European CAMS atmosphere model.

Burn times are estimates, not medical advice.

For the subscription option, subscriptions renew within 24 hours of the subscription period ending, and a subscription purchase will be charged through your iTunes account. Manage at any time using Account Settings in iTunes. Terms of Use can be found at: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.streamlinedstudios.com/privacy/


## Version history (last 1 release)

### 1.0 — 2026-08-19

No release notes.

## More apps by Streamlined Studios

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All apps by Streamlined Studios: https://appshunter.io/developer/1802378603

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*