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SunDay: Vitamin D & UV Monitor for iOS

Developer's Description

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.

Full Specifications

What's new in version 3.1.0


Release May 7, 2020
Date Added May 7, 2020
Version 3.1.0

Operating Systems

Operating Systems iOS
Additional Requirements Requires iOS 10.2 or later. Compatible with iPhone, iPad, and iPod touch.


Total Downloads 0
Downloads Last Week 0
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