# Sun Day Tracker — Track Your D > Simple app to track daily vitamin D intake from the sun. (iPhone/iPad app by permissionless tech, llc.) - Source: https://appshunter.io/ios/app/sun-day-tracker/id6748545544 (this page in markdown: same URL + `.md`) - Developer: [permissionless tech, llc](https://appshunter.io/developer/1824145893) - Category: Health & Fitness - Price: Free - Rating: 4.60/5 from 26 App Store ratings · 23 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 1 MB - Languages: American English - Released: 2025-07-14 - Data updated: 2026-08-24 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews.md ## What is Sun Day Tracker? A simple app to track you daily vitamin D intake from the sun. ## Key features - Track daily vitamin D intake - Sunlight exposure monitoring - Simple interface - Daily tracking ## Recent user reviews (10 of 23) All indexed reviews: https://appshunter.io/ios/app/sun-day-tracker/id6748545544/reviews.md ### 5/5 — 改进 *2026-07-30* 增加中文就好了哈哈哈 ### 5/5 — Love it! *2026-07-14* Need Apple Watch version tho ### 5/5 — Total Lifesaver *2026-07-02* Avoid overusing toxic sunscreen with this app. Works very consistently. Most valuable free app on my phone. ### 1/5 — Buggy *2026-06-24* Constantly pauses itself when it should be running in the background ### 5/5 — Very useful app *2026-06-15* It is a very useful app that shows the uv index way more exactly than other apps - especially compared to the native weather app on iPhone. I would love an App for Apple Watch as well, because that would make tracking the uv exposure a lot more comfortable. ### 5/5 — Chinese！ *2026-05-23* If possible we need Chinese thank you! ### 5/5 — REQUEST: Add field to data *2026-04-15* When Sun Day entries get pulled into the Foodnoms app from Apple Health it uses the ‘Source: Sun Day’ field from the structured data as the title. I think if you added ‘Food Type: Sunlight’ or something like that it would improve how this displays in other apps. ### 5/5 — Best app for vitamin d *2026-03-11* Tracks 1. how long you can be outside 2. Clothes you are wearing 3. Whether you’re wearing sunscreen or not 4. Skin tone 5. IU’s you getting 6. Etc And then warns you if it’s not light enough out and you should take vitamin d This is clearly the best app, I’ve seen other apps, this one is better and it’s free just get it. ### 4/5 — Amazing app *2025-09-19* This app is very good, especially considering that it's free. It has a beautiful adaptive design and is easy to use and configure. That's worth four stars! There is one drawback: despite its excellent handling, I personally would like to see an overview of the recordings and mirroring to the Apple Watch for easier and faster start-up. All in all, however, it is THE app for me to track my time in the sun. ### 5/5 — Love it! *2025-08-25* This latest version irons out all the niggles of the original: it now keeps a session if you accidentally close the app, and the UV index seems to tally to local weather app now. I love it, thanks Jack! ## Frequently asked questions about Sun Day Tracker ### What is Sun Day Tracker? Sun Day Tracker is a simple application designed to help users monitor their daily vitamin D intake derived from sun exposure. It provides a straightforward way to log and track this aspect of your health. ### Is Sun Day Tracker free to use? Yes, Sun Day Tracker is available for free. There are no costs associated with downloading or using its core features for tracking your sun-related vitamin D intake. ### What devices does Sun Day Tracker support? Currently, Sun Day Tracker is supported on iPhone devices. The app is designed to be accessible for iOS users looking to track their sun exposure. ### How often is Sun Day Tracker updated? The latest version of Sun Day Tracker is 1.1.2, which was last updated on September 9, 2025. Updates aim to improve functionality and user experience. ### What is the age rating for Sun Day Tracker? Sun Day Tracker has an age rating of 4+. This indicates it is suitable for users of all ages, with no specific content restrictions. ### How accurate is Sun Day Tracker? The app's accuracy in tracking vitamin D intake from the sun is dependent on user input and environmental factors. It serves as a personal log to help users stay mindful of their exposure. ### Does Sun Day Tracker integrate with other health apps? Based on the provided information, there is no mention of integration with other health applications. Sun Day Tracker focuses solely on tracking vitamin D intake from the sun. ### What do users think of Sun Day Tracker? Users have rated Sun Day Tracker highly, with an average of 4.6 stars from 17 ratings. This suggests a positive user sentiment towards the app's simplicity and utility. ## Version history (last 3 releases) ### 1.1.2 — 2025-09-09 - many bug fixes and improvements ### 1.1.1 — 2025-08-21 - added ability to enter a session in the past - can change end time after session ends - added ability to set sunscreen level - updating widget more frequently ### 1.0 — 2025-07-14 No release notes. ## Apps similar to Sun Day Tracker | App | Rating | Price | Category | | --- | --- | --- | --- | | [SunSeek: Sunlight & Vitamin D](https://appshunter.io/ios/app/sunseek-sunlight-and-vitamin-d/id6737204818) | 4.8 (143) | Free | Health & Fitness | | [MyCircadianApp](https://appshunter.io/ios/app/mycircadianapp/id6538168795) | 4.9 (264) | Free | Health & Fitness | | [Rays: Auto Vitamin D Tracking](https://appshunter.io/ios/app/rays-auto-vitamin-d-tracking/id6752499967) | 4.4 (7) | Free | Health & Fitness | | [Coherence - Breathwork](https://appshunter.io/ios/app/coherence-breathwork/id6740344645) | 4.8 (498) | Free | Health & Fitness | | [Don't Die - Bryan Johnson](https://appshunter.io/ios/app/dont-die-bryan-johnson/id6479563760) | 4.8 (641) | Free | Health & Fitness | | [Sunned: Vitamin D & Sun Timer](https://appshunter.io/ios/app/sunned-vitamin-d-and-sun-timer/id6741027703) | 3.7 (3) | Free | Health & Fitness | ## More apps by permissionless tech, llc - [bitchat mesh](https://appshunter.io/ios/app/bitchat-mesh/id6748219622) All apps by permissionless tech, llc: https://appshunter.io/developer/1824145893 ## Related topics [rsun day](https://appshunter.io/ios/topics/rsun-day) · [free vitamin d tracker](https://appshunter.io/ios/topics/free-vitamin-d-tracker) · [vitamin d tracker](https://appshunter.io/ios/topics/vitamin-d-tracker) · [sunday](https://appshunter.io/ios/topics/sunday) · [vitamin d sun tracker](https://appshunter.io/ios/topics/vitamin-d-sun-tracker) · [my sunbit](https://appshunter.io/ios/topics/my-sunbit) · [sun tracker light](https://appshunter.io/ios/topics/sun-tracker-light) · [sunlife us](https://appshunter.io/ios/topics/sunlife-us) --- *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 2026-08-24.*