# Daily D3 — Track Vitamin D w Sun Exposure > Forecasts UV index and Vitamin D gains from sun exposure based on skin type. (iPhone/iPad app by Man Truong.) - Source: https://appshunter.io/ios/app/daily-d3/id1673280985 (this page in markdown: same URL + `.md`) - Developer: [Man Truong](https://appshunter.io/developer/1650115989) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 17+ - Requires: iOS 12.4 · 22 MB - Languages: English - Released: 2023-03-19 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/daily-d3/id1673280985/reviews.md ## What is Daily D3? Get the sun's UV forecast in a beautiful and powerful app. Forecast and predict Vitamin D gains from your day's sun exposure. See current and forecasted UV index and Vitamin D for each hour of today with a smart layout that allows you decide when the best time of the day to get your daily Vitamin D3 is! Features Forecasts • See the most important weather information in a smart layout that adjusts to the current conditions. • View hourly forecasts for today of UV Index. • Tap to set a daily goal for Vitamin D benefit from today's sun exposure and the app shows you how much time you need in the sun. • Adjust the time of day, minute‑by‑minute, so you can see when the best times to get sun is. • See graphical representations of UV index, sunrise, sunset, and current temperate and conditions. Skin Tone Picker • See an inclusive list of skin types and skin tones to chose from, so that you can know exactly how much sun exposure your skin type needs • See the skin type behaviors descriptions as well, which are supported by academic research, to get your personalized forecast ## Key features - UV index forecasts - Vitamin D gain prediction - Personalized sun exposure goals - Hourly sun exposure recommendations - Skin tone picker for personalized needs - Graphical weather representations ## Frequently asked questions about Daily D3 ### What is Daily D3? Daily D3 is a free app that forecasts the UV index and predicts your potential Vitamin D gains from sun exposure. It helps you determine the best times to be in the sun based on your skin type and daily goals. ### How does Daily D3 personalize sun exposure recommendations? Daily D3 uses a skin tone picker, offering an inclusive list of skin types and tones. Based on your selection and academic research on skin type behaviors, it provides a personalized forecast for your sun exposure needs. ### What kind of forecasts does Daily D3 provide? The app provides hourly forecasts for the UV index today, along with graphical representations of UV index, sunrise, sunset, and current temperature and conditions. It also predicts your Vitamin D gains from your day's sun exposure. ### Can I set goals within Daily D3? Yes, you can set a daily goal for Vitamin D benefit from today's sun exposure. The app will then show you how much time you need to spend in the sun to achieve that goal. ### Does Daily D3 have ads? No, Daily D3 is ad-free, allowing for an uninterrupted user experience focused on tracking your sun exposure and Vitamin D levels. ### What devices is Daily D3 available on? Daily D3 is available on iPhone, iPad, and iPod devices, making it accessible to a wide range of Apple users. ### How often is Daily D3 updated? The latest version of Daily D3 is 1.0.7, which was last updated on April 25, 2023. This indicates regular maintenance and potential feature additions. ### What is the age rating for Daily D3? Daily D3 has an age rating of 17+. This is likely due to the nature of health-related information and the app's focus on sun exposure. ## Version history (last 3 releases) ### 1.0.7 — 2023-04-25 Photography backgrounds are now credited to the photographer! The photographer's portfolio and host are both linked. ### 1.0.6 — 2023-04-23 New UX and UX fixes: 1. Added a Loading Screen (attributing D3 designer) 2. App now caches user's Skin Tone and Weather Background from previous session 3. App loads in Forecast Screen if user's Skin Tone is already available, other takes user to Skin Tone picker 4. Picking a Skin Tone auto scrolls to the Forecast screen ### 1.0.4 — 2023-03-19 No release notes. ## Apps similar to Daily D3 | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sunlight Tracking by Riseroo](https://appshunter.io/ios/app/sunlight-tracking-by-riseroo/id6446605216) | 4.7 (25) | Free | Health & Fitness | | [YOFIMA 2](https://appshunter.io/ios/app/yofima-2/id1569632442) | 5.0 (1) | Free | Health & Fitness | | [Sun Exposure: Time in Daylight](https://appshunter.io/ios/app/sun-exposure-time-in-daylight/id6463570196) | 4.5 (40) | Free | Health & Fitness | | [Daylight Goals Sunlight Timer](https://appshunter.io/ios/app/daylight-goals-sunlight-timer/id6466341899) | 4.7 (82) | Free | Health & Fitness | | [EZCheck - Instant Blood Test](https://appshunter.io/ios/app/ezcheck-instant-blood-test/id6461348790) | — | Free | Health & Fitness | | [UVSiesta: Vitamin D & Tanning](https://appshunter.io/ios/app/uvsiesta-vitamin-d-and-tanning/id6467558440) | 5.0 (1) | Free | Health & Fitness | --- *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.*