# Vitamin D Sun Tracker - Bask — UV Index & Exposure Timer

> Vitamin D sun exposure and supplement tracker with personalized sun safety guidance. (iPhone/iPad app by Greycloud LLC.)

- Source: https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235 (this page in markdown: same URL + `.md`)
- Developer: [Greycloud LLC](https://appshunter.io/developer/1767904895)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.90/5 from 9 App Store ratings · 1 written reviews indexed
- Age rating: 17+
- Requires: iOS 16.0 · 42 MB
- Languages: American English
- Released: 2026-02-06
- Data updated: 2026-08-18
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235/reviews.md

## What is Vitamin D Sun Tracker?

Vitamin D is the easiest deficiency to fix, but the hardest to track. Bask estimates the Vitamin D you get from sun exposure and supplements, so you can stop guessing and start hitting your goal.

Bask is a sun tracker and sun timer that reads the sky, live UV Index, weather, your skin, and what you're wearing to tell you the best time to step outside and exactly how long to stay.

SUN SESSIONS + SUN SAFETY
- Real-time Vitamin D estimates from our live UV Index, UV tracker, weather, and our sun tracker algorithm
- Built-in sun timer with time-to-sunburn guidance so you never overdo it
- Time-to-sunburn timer can assist you during your tanning sessions.
- Live Activities keep your session on the Lock Screen (iOS 16.1+)

FIND YOUR BEST SUN WINDOWS
- 48-hour UV forecast of your optimal exposure times with our sun tracker
- Get alerts right before your best Vitamin D window opens

SUPPLEMENTS + COFACTORS
- Quick-log common vitamin D doses in a tap with our vitamin tracker
- Track magnesium & vitamin K2 with bite-size education cards

HISTORY, STREAKS & INSIGHTS
- A clean timeline of every sun exposure session and supplementation.
- Track Vitamin D labs to see the impact of your sun exposure and supplement habits.
- 7 / 30 / 90-day trends to watch your Vitamin D levels climb

PRIVATE BY DESIGN
- Your data stays on your device
- Optional Apple Health integration
- Optional opt-in leaderboard

Bask is for educational and wellness tracking only and does not provide medical advice.
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Key features

- Real-time Vitamin D estimates
- Live UV Index and weather integration
- Personalized sun timer with sunburn guidance
- 48-hour UV forecast for optimal exposure
- Supplement and cofactor tracking
- Historical data and trend analysis
- Optional Apple Health integration

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $24.99 | per year |
| Yearly | $29.99 | per year |
| Monthly | $4.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $79.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/vitamin-d-sun-tracker-bask/id6758405235/reviews.md

### 5/5 — New essential app

*2026-04-24*

I recently did blood work and discovered I had low vitamin d. This app has helped me improve my levels by making it easy to know when to go outside. I use it daily. Couldn’t recommend it enough and has improved my health but mood as well

**Developer response:** So glad Bask could help you out!

## Frequently asked questions about Vitamin D Sun Tracker

### What is Bask's subscription cost?

Bask offers a monthly subscription for $4.99 and a yearly subscription for $24.99. These plans provide access to advanced features and data tracking.

### Does Bask have ads?

No, Bask is ad-free. The application does not display advertisements, ensuring an uninterrupted user experience.

### What devices does Bask support?

Bask is available on iPhone, iPad, and iPod. It is designed to work across various Apple mobile devices.

### How often is Bask updated?

The latest version of Bask is 2.5, and it was last updated on June 23, 2026. Updates typically include new features and performance improvements.

### What is the age rating for Bask?

Bask has an age rating of 17+. This rating is based on the content and features available within the application.

### Can I track my Vitamin D labs with Bask?

Yes, Bask allows you to track your Vitamin D lab results. This feature helps you visualize the impact of your sun exposure and supplement habits over time.

### Does Bask integrate with Apple Health?

Bask offers optional integration with Apple Health. This allows you to sync your health data for a more comprehensive overview.

### What makes Bask's sun tracking unique?

Bask uses a combination of live UV Index, weather, skin type, and clothing information to provide precise guidance on sun exposure duration and optimal times for Vitamin D synthesis.

## Version history (last 5 releases)

### 2.6 — 2026-07-09

Bug fixes and performance improvements

### 2.5 — 2026-06-23

- Track Vitamin D labs over time
- Bug fixes and performance improvements

### 2.4 — 2026-06-16

- Morning and Evening light sessions added
- Improved window calculations
- Bug fixes, UI enhancements, and performance improvements

### 2.3 — 2026-06-06

- Added progress bar on live session page
- Bug fixes and performance improvements

### 2.2 — 2026-06-01

- Fix issue with stopping sessions

## Apps similar to Vitamin D Sun Tracker

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [SunDay: Vitamin D & UV Tracker](https://appshunter.io/ios/app/sunday-vitamin-d-and-uv-tracker/id1133953409) | 3.9 (33) | 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 |
| [Hello Sun - Vitamin D Tracker](https://appshunter.io/ios/app/hello-sun-vitamin-d-tracker/id6756599125) | 5.0 (1) | 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 |
| [SunMax: Vitamin D Tracker](https://appshunter.io/ios/app/sunmax-vitamin-d-tracker/id6749281214) | — | Free | Health & Fitness |
| [SunSeek: Sunlight & Vitamin D](https://appshunter.io/ios/app/sunseek-sunlight-and-vitamin-d/id6737204818) | 4.8 (143) | Free | Health & Fitness |

## More apps by Greycloud LLC

- [Posture Fix Exercises: Olly](https://appshunter.io/ios/app/posture-fix-exercises-olly/id6676999993)

All apps by Greycloud LLC: https://appshunter.io/developer/1767904895

## Related topics

[free vitamin d tracker](https://appshunter.io/ios/topics/free-vitamin-d-tracker) · [vitamin d sun tracker](https://appshunter.io/ios/topics/vitamin-d-sun-tracker) · [sunwise ai](https://appshunter.io/ios/topics/sunwise-ai) · [vitamin d sun](https://appshunter.io/ios/topics/vitamin-d-sun) · [sun exposure guide for health](https://appshunter.io/ios/topics/sun-exposure-guide-for-health)

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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 2026-08-18.*