Vitamin D Sun Tracker - Bask
UV Index & Exposure Timer
Free · In‑App Purchases
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/
Bug fixes and performance improvements
The developer, Greycloud LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Greycloud LLC
- Size
- 44.2 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Frequent
Medical Treatment information
Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Yearly $29.99
- Monthly $4.99
- Yearly $24.99
- Weekly $1.99
- Lifetime $79.99
- Copyright
- © 2026 Greycloud LLC