dminder

ontometrics

In-app purchases

About this app

Comprehensive Vitamin D tracking app. Uses the GPS in your phone to figure out where you are on the planet then computes when you can get D, how much of it you can make, gives you a timer and in the paid version the ability to manage history and have the app estimate your levels on an ongoing basis.

Ratings and reviews

App is great for getting an idea of how much vitamin d you're producing as a result of sun exposure. However, it is a bit clunky although greatly improved over the years. The overcast light sensor doesn't work at all; while it does measure the amount of lux, the slider is stuck on 99% overcast regardless of actual levels and light measured.