# Sun-Day — Track sun & optimize vitamin D

> Intelligent tool for sun exposure tracking and Vitamin D optimization. (iPhone/iPad app by DIH.)

- Source: https://appshunter.io/ios/app/sun-day/id6760581712 (this page in markdown: same URL + `.md`)
- Developer: [DIH](https://appshunter.io/developer/1884918539)
- Category: Weather
- Price: Free
- Rating: 1.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.1 · 32 MB
- Languages: American English, French (France)
- Released: 2026-04-11
- Data updated: 2026-08-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sun-day/id6760581712/reviews.md

## What is Sun?

Sun Day is a refined, intelligent tool designed for those who embrace an active lifestyle while maintaining a commitment to skin health. By synthesizing real-time environmental data with your personal health metrics, Sun Day transforms how you interact with the sun.

At its core, Sun Day provides a precise, location-aware UV Index, allowing you to make informed decisions about your time outdoors. Whether you are planning a morning run or a weekend at the coast, the app offers the clarity needed to balance sun exposure with safety.

Key capabilities include:

- Real-time UV tracking: Accurate, location-based data to keep you informed.
- Health Integration: Seamlessly syncs with Apple Health to track Vitamin D synthesis, providing a holistic view of your wellness.
- Intelligent Alerts: Proactive notifications that guide you on when to seek shade or reapply protection, tailored to your specific needs.
- Elegant Interface: A minimalist design that prioritizes readability and ease of use, ensuring you get the information you need without distraction.

Sun Day is more than a tracker; it is an essential partner in your daily wellness routine, offering the peace of mind that comes with being prepared.

## Key features

- Real-time UV tracking
- Health integration (Apple Health)
- Vitamin D synthesis tracking
- Intelligent sun exposure alerts
- Minimalist and readable interface


## Frequently asked questions about Sun

### What is Sun-Day?

Sun-Day is a tool designed to help you manage your sun exposure and optimize Vitamin D synthesis. It provides real-time UV index data and integrates with Apple Health.

### How does Sun-Day track Vitamin D?

Sun-Day syncs with Apple Health to track your Vitamin D synthesis, offering a holistic view of your wellness related to sun exposure.

### Does Sun-Day provide alerts?

Yes, Sun-Day offers intelligent alerts that notify you when to seek shade or reapply sun protection based on your personalized needs and current UV index.

### What devices does Sun-Day support?

Sun-Day is currently supported on iPhone and iPod devices.

### Is Sun-Day free to use?

Yes, Sun-Day is available for free.

### How often is Sun-Day updated?

Sun-Day was last updated on April 11, 2026, with version 1.0. Further update frequency is not specified.

### What is the age rating for Sun-Day?

Sun-Day has an age rating of 4+, making it suitable for a wide range of users.

### Does Sun-Day have ads?

No, Sun-Day does not contain advertisements.

## Version history (last 1 release)

### 1.0 — 2026-04-11

No release notes.

## More apps by DIH

- [StreamVision - IPTV](https://appshunter.io/ios/app/streamvision-iptv/id6760549542)
- [SmartCaddie](https://appshunter.io/ios/app/smartcaddie/id6762388404)
- [Sauna Cycle: Heat Cold Rest](https://appshunter.io/ios/app/sauna-cycle-heat-cold-rest/id6788517158)

All apps by DIH: https://appshunter.io/developer/1884918539

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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 2026-08-01.*