# EPA's SunWise UV Index

> UV radiation forecast and sun safety advice for outdoor activity planning. (iPhone/iPad app by Environmental Protection Agency.)

- Source: https://appshunter.io/ios/app/epas-sunwise-uv-index/id466052686 (this page in markdown: same URL + `.md`)
- Developer: [Environmental Protection Agency](https://appshunter.io/developer/466052690)
- Category: Weather
- Price: Free
- Rating: 3.13/5 from 67 App Store ratings · 61 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.4 · 14 MB
- Languages: English
- Released: 2011-09-22
- Data updated: 2026-07-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/epas-sunwise-uv-index/id466052686/reviews.md

## What is EPA's SunWise UV Index?

Skin cancer is one of the most common cancers, but also one of the most preventable. The UV Index provides a daily and hourly forecast of the expected intensity of ultraviolet (UV) radiation from the sun, as well as sun safety tips, to help you plan your outdoor activities. Some exposure to sunlight is enjoyable. However, too much sun can be dangerous. Overexposure to the sun's UV radiation can cause immediate damage, such as sunburn, and long-term problems, such as skin cancer and cataracts.

It is important to remember that people of all skin types need to be protected from overexposure to the sun. Make checking the UV Index part of planning your day and remember to slip on a shirt, slop on some SPF-15 + sunscreen, slap on a hat, and wrap on sunglasses to protect against the sun. 

The UV Index is brought to you by EPA, the National Weather Service, and The Centers for Disease Control and Prevention.

## Key features

- Daily UV Index forecast
- Hourly UV Index forecast
- Sun safety tips
- Outdoor activity planning
- UV radiation intensity information

## Chart rankings

- #169 in Top Free · Weather (US App Store)

## Recent user reviews (10 of 61)

All indexed reviews: https://appshunter.io/ios/app/epas-sunwise-uv-index/id466052686/reviews.md

### 2/5 — Not great

*2026-07-01, version 7.0.0*

Glitchy and not well coded at all. Location does nothing. Interface is janky. Other apps do this far better and it’s not their only focus. Not recommended unless they hire competent coders. Not the case currently.

### 2/5 — Broken

*2026-04-30, version 7.0.0*

Stopped working

### 1/5 — No longer working

*2026-03-01, version 7.0.0*

No longer able to use this app. It will not post the current UV or hourly UV.

### 2/5 — Lots of room for improvement

*2024-07-29, version 7.0.0*

The app has some good information that can give you an accurate baseline, but it certainly has LOTS of room for improvement.  Other than your location, there are ZERO personal factors taken into account.  That might work well for some people, but I’m a natural redhead with light blue eyes and an extremely pale complexion, living in southern Florida, and I need an app that takes that into account.  I read through all the EPA’s UV calculations, which consider wavelength, elevation, angle of the sun, ozone depletion, cloud cover, etc, but then only use some unknown “average” to calculate the sensitivity of human skin.  Why bother being so accurate with your locational calculations to then turn around and assume every person is exactly the same?  I really wish the EPA would realize that people are also as unique as locations, and that absolutely NEEDS to be taken into account.

### 2/5 — No notifications

*2024-06-26, version 7.0.0*

Unfortunately there doesn’t seem to be a way to configure notifications when the UV is about to go over a certain chosen level. Additionally the data appears to sometimes be unavailable.

### 3/5 — Useful but there are glitches

*2024-04-13, version 7.0.0*

The app is very useful, especially the hourly forecast, but the daily map has some technical issues.  First, one cannot read the scale on the map; second, the dates for the maps change when the orientation of the ipad changes from portrait to landscape; third, the map is rather small and cannot be enlarged on the screen.

### 4/5 — Works fine

*2023-08-20, version 7.0.0*

Rough around the edges but works fine
Wish there was an apple watch widget

### 3/5 — Doesn’t seem accurate

*2023-03-28, version 7.0.0*

This consistently shows much higher uv index than my other apps.  It may be that this is the only accurate one, but it is more likely that it is inaccurate.

### 5/5 — It does well what I need it to do

*2022-09-15, version 5.1*

I have had skin cancer so I now take extra precautions by checking what the projected UV risk will be for the day and prepare myself. It does everything I need. Thanks, EPA!

### 1/5 — Stopped working

*2022-08-24, version 5.1*

This a 5 star app and brilliant for UV (and once u know how to use it, can accurately know the weather 5 days in advance much better than any 5 day forecast).   That said, it stopped working 3 days ago and doesn’t seem to be coming back.

## Frequently asked questions about EPA's SunWise UV Index

### What does the SunWise UV Index app do?

The app provides daily and hourly forecasts of the sun's ultraviolet (UV) radiation intensity. It also offers essential sun safety tips to help users plan their outdoor activities while minimizing the risk of sun damage.

### What are the key features of the SunWise UV Index app?

Key features include daily and hourly UV Index forecasts, providing users with information on expected UV radiation intensity. It also offers practical sun safety advice, such as recommendations for sunscreen, hats, and sunglasses.

### Is the SunWise UV Index app free to use?

Yes, the app is completely free to use. It does not have any in-app purchases or advertisements, making it accessible for everyone seeking to protect themselves from the sun.

### Who is the target audience for this app?

The app is designed for anyone who spends time outdoors, regardless of skin type. It is particularly useful for individuals concerned about the immediate and long-term health risks associated with overexposure to the sun's UV radiation.

### How can this app help me plan my outdoor activities?

By providing a forecast of UV radiation intensity, the app helps you understand when the sun's rays will be strongest. This allows you to schedule outdoor activities during safer times or take necessary precautions, like seeking shade or applying sunscreen.

## Version history (last 5 releases)

### 7.0.0 — 2022-12-13

Updated the user interface, improved choosing to get your forecast by your current location.

### 5.1 — 2019-11-26

Application has been updated to retrieve UV Information from a new data server, with increased performance.

### 5.0 — 2019-05-21

-The app provides UV forecasts and information in Spanish, in addition to English.
-The app’s sun safety tips were updated with the assistance of the Centers for Disease Control and Prevention.

### 4.1 — 2015-03-05

Updated GPS support.

Optimized for the iPad and iPhone 6/6 Plus.  Updated for iOS 8.

### 4.0 — 2015-02-19

Optimized for the iPad and iPhone 6/6 Plus.  Updated for iOS 8.

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## More apps by Environmental Protection Agency

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All apps by Environmental Protection Agency: https://appshunter.io/developer/466052690

## Related topics

[sunwise uv index](https://appshunter.io/ios/topics/sunwise-uv-index) · [sunwise](https://appshunter.io/ios/topics/sunwise) · [sunlighten](https://appshunter.io/ios/topics/sunlighten) · [sunfresh](https://appshunter.io/ios/topics/sunfresh) · [environmental protection](https://appshunter.io/ios/topics/environmental-protection)

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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 2026-07-09.*