iPhone Screenshots


Get vitamin D from the Sun. Avoid sunburn.

Track your child’s vitamin D intake, measure progress, and create healthy habits.

SunDay helps you make sure that your child is safe while being out in the Sun. With our smart Timer you can relax while enjoying your time outside, as we will notify about sunburn risks.

How it works

‣ Scan the Sun
‣ Start the timer
‣ Know when to end the session
‣ Complete daily vitamin D goal
‣ Track progress
‣ Build healthy habits


• Solar UV Scanner
• Sun Finder - for cloudy weather
• Session Timer and Calculator
• Daily goals and reminders
• Child profile customization
• Progress stats and achievements

The calculations are done with utmost precision based on your child’s skin type, age, weight and clothing.

In addition to helping prevent skin damage, SunDay will display how much vitamin D IU your child receives during the time in direct sunlight.

Our goals

- Spread the word about the benefits of Sun-generated vitamin D
- Prevent vitamin D deficiency among children
- Create more reasons for families to spend time outdoors
- Healthier lifestyles for our children


SunDay is intended to be used for educational purposes only. It should not be used as a substitute for professional medical advice. Please consult your health care professional before making any health, medical or other decisions based on the results of the daily calculations of vitamin D intake provided by this app.

What’s New

Version 3.0.3

Thank you for using SunDay! We update our app regularly to make your experience even better. This update includes bug fixes and performance improvements.

Ratings and Reviews

5.0 out of 5
15 Ratings

15 Ratings

John Hambardzumyan ,

amazing application 🔥

It has a very good design, I do not even say what a good program it is, I do not see a fault, a great job.

Tevariel ,

Amazing App!

Love the app, it's super easy to scan the sun, and see how long my sister needs to play in the sun.

Elennnanaaan ,

Healthy children

Thank you for such amazing app.


'Heuristic Innovations' LLC
203.8 MB
Health & Fitness

Requires iOS 10.2 or later. Compatible with iPhone, iPad and iPod touch.


English, French, Russian, Spanish

Age Rating
Rated 4+
© 2017 Heuristic Innovations LLC.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

You May Also Like