Get the app, check to get adequate Vitamin D!

http://dminder.ontometrics.com/

Wherever you go in the world, dminder tracks the sun and tells you when you can get Vitamin D. The stopwatch interface lets you set your session target by either amount of D to get or time. Then it will count up or down to your target, applying all the factors that determine how much D you can get: skin tone, age, weight, amount of skin exposed. All your doses of D, from the sun or supplements, are used to continuously estimate your current level. Developed with world authority on Vitamin D, Dr. Michael Holick.

Get it either from the Itunes Store or Google Play Store!

DminderAPP