Know How Much Sun Exposure You Still Need to Get

Why?

You need the sun for your body to create vitamin D.

How?

A function of a smart watch that is set up for your skin type (so you don’t get sunburns) and measures the daily dosage of sun you get. During the day you can see how much sun time you still need (also based on your location, time of year, and time of day), and how many international units of vitamin you need to take that day if you don’t get any more sun exposure.