dminder is a great app to estimate Vitamin D "intake"/production through sun exposure (and also food, albeit this won't matter much for most people): http://dm

dminder is a great app to estimate Vitamin D "intake"/production through sun exposure (and also food, albeit this won't matter much for most people): http://dminder.ontometrics.com/ http://dminder.ontometrics.com/ I only wish the algorithm used to derive the estimates was public/documented somewhere ... http://dminder.ontometrics.com/Estimation.html http://dminder.ontometrics.com/Estimation.html