Track Your Vitamin D
From the Sun

dminder tells you when you can get Vitamin D, tracks how much you're making, and keeps you safe from burns. Developed with world authority on Vitamin D, Dr. Michael Holick.

80% of Americans are Vitamin D deficient

Studies link deficiency to diabetes, heart disease, depression, and increased cancer risk.

What dminder does for you

Sun Tracker

Knows when UVB is available at your location and tells you the optimal time to go outside.

Smart Timer

Set a target by D amount or time. The timer counts your session and alerts you when to stop.

D Level Estimator

Continuously estimates your blood Vitamin D level based on sun sessions, supplements, and labs.

Personalized

Adapts to your skin type, age, weight, and amount of skin exposed for accurate results.

Science-backed

Developed in collaboration with Dr. Michael Holick, Professor of Medicine at Boston University and world authority on Vitamin D. The algorithms consider solar elevation, ozone levels, skin type, age, and body composition.

What people say

"Thanks for such a cool App!!! I can't believe there is something available to help us with such an important factor for our health!! Thanks so much for such a great idea!!"

— Jennifer

"Very cool app. Thanks for doing this."

— Bruce

"Really love your app, well done."

— Brendan

"I absolutely LOVE your app. Thanks so much."

— Tara

Start tracking your Vitamin D today

Free on iOS and Android.