# Wolfram Sun Exposure Reference App > Calculates safe sun exposure times and provides UV forecasts. (iPhone/iPad app by Wolfram Group LLC.) - Source: https://appshunter.io/ios/app/wolfram-sun-exposure-reference-app/id452253352 (this page in markdown: same URL + `.md`) - Developer: [Wolfram Group LLC](https://appshunter.io/developer/715130979) - Category: Reference, Health & Fitness - Price: $0.99 - Rating: 3.82/5 from 11 App Store ratings · 17 written reviews indexed - Age rating: 4+ - Requires: iOS 9.3 · 13 MB - Languages: English - Released: 2011-08-01 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/wolfram-sun-exposure-reference-app/id452253352/reviews.md ## What is Wolfram Sun Exposure Reference App? The Wolfram Sun Exposure Reference App is your ultimate beach essential this summer and all year! It calculates how long your skin can be exposed to the Sun without burning based on your skin type, location, time, and the level of Sun protection factor (SPF) you might be using. You can also compute a UV forecast for your location, along with a sun protection advisory. Bonus features include sunrise and sunset time, current Sun position, and weather forecast. The personalized results show you: - How long you can stay in the Sun before you’re likely to burn based on the factors you reported - Results automatically computed for your current location along with an option to enter any location, worldwide - A Sun protection advisory recommending an SPF level - A UV forecast for your location - Information on the UV levels for a five-day period that includes the past 24 hours - A UV index forecast map that you can manipulate by date and time The Wolfram Sun Exposure Reference App is powered by the Wolfram|Alpha computational knowledge engine and is created by Wolfram Research, makers of Mathematica—the world's leading software system for mathematical research and education. The Wolfram Sun Exposure Reference App draws on the computational power of Wolfram|Alpha's supercomputers over a 3G, 4G, or Wi-Fi connection. ## Key features - Safe sun exposure calculation - UV forecast and advisory - SPF recommendations - Sunrise and sunset times - Current Sun position - Weather forecast ## Recent user reviews (10 of 17) All indexed reviews: https://appshunter.io/ios/app/wolfram-sun-exposure-reference-app/id452253352/reviews.md ### 1/5 — Does not work anymore. *2025-07-11* I used this for years & it worked great. I tried opening it about May 2025 as usual, “Time to sunburn”, “Compute” with the default “Skin Type:” the default of all. It shows the computed values briefly & immediately crashes. Tried it again same year, once in June and once in July hoping that it got fixed, but it still crashes. ### 5/5 — Now working again (09-07-2022) *2022-07-09, version 1.3.1* I have just returned to remove my recent review saying that this usually very reliable app had suddenly stopped providing any data no matter which category I chose… As of today, Saturday July 9th, all data I request is being provided again, thank you. Here in the U.K. we are currently being exposed to very high UVI levels (8!) that I have only been exposed to when on holiday in the Mediterranean countries where very UVI levels can be expected at this time of year. I am so glad to now be able to continue using the excellent Wolfram Sun app as a tool in my sun awareness/protection toolbox! Thorvald (pronounced Tourval…) ### 2/5 — What happened???? *2022-07-05* Really upset lately says no data available!!! I have used this app for years and now I have no information HELP!!! ### 1/5 — No info *2021-03-11* I just payed for this app for it to say there “is no data available” super lame ### 5/5 — Exactly what I needed *2018-07-18* This is an amazing little app, especially for the price I payed. I don’t like to spend crazy amounts of time in the heat, but I also enjoy having a tan. I use this to figure out when is the best time to go out, get some quick sun and go back in. It’s also great for those who those who want to avoid too much sun exposure. Ps. Always remember to wear SPF 15+ ### 5/5 — Great app. Could be better! *2018-06-19* The info provided by the app is priceless. The app would be truly great if it could remember the info I have to re-input every time u use it... ### 5/5 — Useful app *2017-09-25* Gives you a great overview of how harsh the sun is and the kind of protection you will need. If you're as pale as I am, it's a must. Very easy to use. ### 4/5 — Doesn't work today :( *2016-09-12* I love this app, but it's broken! Please help Wolfram! ### 1/5 — Ghastly interface, no user presets *2016-07-01, version 1.2* Nice idea but very, very poorly executed. The input tables are a mess and it doesn't remember your preferences you have to re-enter and re-calculate each time. ### 2/5 — Not useful in NZ *2016-01-02, version 1.2* The app does everything it says, but it's useless in NZ and horrible to use. Anytime between 9 and 5, expect sunburn. There's a section for comparing different sunscreen SPFs but any of the options seem to make 'sunburn unlikely'. The app could be generously described as 'functional', meaning it's unnecessarily clunky and the graphs suck. I'm glad the scale lets us see time-to-sunburn at midnight, but might it not be more sensible to zoom in on the section where people get sunburnt? Great idea, great data, poor app. ## Frequently asked questions about Wolfram Sun Exposure Reference App ### What is the Wolfram Sun Exposure Reference App? The Wolfram Sun Exposure Reference App calculates how long your skin can be exposed to the sun without burning, based on your skin type, location, time, and SPF. It also provides UV forecasts and sun protection advisories. ### How much does the Wolfram Sun Exposure Reference App cost? The Wolfram Sun Exposure Reference App is a paid application, priced at $0.99. ### What devices is the Wolfram Sun Exposure Reference App available on? The Wolfram Sun Exposure Reference App is supported on iPhone, iPad, and iPod. ### What is the age rating for the Wolfram Sun Exposure Reference App? The Wolfram Sun Exposure Reference App has an age rating of 4+. ### How often is the Wolfram Sun Exposure Reference App updated? The Wolfram Sun Exposure Reference App was last updated on May 15, 2017, with version 1.3.1. ### Does the Wolfram Sun Exposure Reference App have ads? No, the Wolfram Sun Exposure Reference App does not contain advertisements. ### Can I get a UV forecast for any location with the Wolfram Sun Exposure Reference App? Yes, the app allows you to compute a UV forecast for your current location or any other location worldwide. ### What kind of information does the Wolfram Sun Exposure Reference App provide about UV levels? It provides a UV forecast for your location, including UV levels for a five-day period that includes the past 24 hours, and a manipulable UV index forecast map. ## Version history (last 5 releases) ### 1.3.1 — 2017-05-15 This app has been updated by Apple to display the Apple Watch app icon. - Bug fixes ### 1.3 — 2017-04-27 - Bug fixes ### 1.2 — 2014-11-03 - Significant design updates, bug fixes ### 1.0.3 — 2013-06-14 Bug fixes. Retina iPad and iPhone 5 support. ### 1.0.2 — 2011-12-06 In-app recommendations Minor bug fixes ## Apps similar to Wolfram Sun Exposure Reference App | App | Rating | Price | Category | | --- | --- | --- | --- | | [Turf MD](https://appshunter.io/ios/app/turf-md/id1086127549) | 3.5 (4) | $0.99 | Reference | | [Concise English Dictionary HD](https://appshunter.io/ios/app/concise-english-dictionary-hd/id838444086) | 4.2 (9) | $1.99 | Reference | | [Classic Science Fiction Novels](https://appshunter.io/ios/app/classic-science-fiction-novels/id1514516040) | 5.0 (1) | $1.99 | Reference | | [Mark Twain's works and quotes](https://appshunter.io/ios/app/mark-twains-works-and-quotes/id1527706471) | — | $1.99 | Reference | | [Modern Military Aircraft](https://appshunter.io/ios/app/modern-military-aircraft/id1440183813) | 4.8 (37) | $1.99 | Reference | | [Warning Lights For Mini Cooper](https://appshunter.io/ios/app/warning-lights-for-mini-cooper/id923853769) | 3.3 (4) | $1.99 | Reference | ## More apps by Wolfram Group LLC - [WolframAlpha Classic](https://appshunter.io/ios/app/wolframalpha-classic/id334989259) - [Wolfram Algebra Course Assistant](https://appshunter.io/ios/app/wolfram-algebra-course-assistant/id410592976) - [Wolfram Calculus Course Assistant](https://appshunter.io/ios/app/wolfram-calculus-course-assistant/id410594105) - [Wolfram Music Theory Course Assistant](https://appshunter.io/ios/app/wolfram-music-theory-course-assistant/id410595605) - [Wolfram Multivariable Calculus Course Assistant](https://appshunter.io/ios/app/wolfram-multivariable-calculus-course-assistant/id428100167) - [Wolfram Astronomy Course Assistant](https://appshunter.io/ios/app/wolfram-astronomy-course-assistant/id428103833) All apps by Wolfram Group LLC: https://appshunter.io/developer/715130979 --- *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 2026-06-10.*