D-Minder

ontometrics

In-app purchases

About this app

D-Minder helps you maintain optimal vitamin D levels by tracking sun exposure, supplements, and dietary intake. Using real-time solar position and satellite ozone data, D-Minder calculates how much vitamin D you produce during each session.

Ratings and reviews

Used to love this app. Has been unusable since I updated on March 9th, 2026. No new sun sessions save. When you record a sun session and hit end, it just keeps beeping until you have to force close the app and then your session is gone. Horrible when you have earphones in. You can't even adjust the notifications you want to receive, you're forced to get all of them. You can longer input your own daily goal for IUs. I want the old version back.

I have used this app daily for about 2 years, March 26 update did not accurately move my history and there's no way to adjust it. There is also no way to accurately see your daily amounts like in the past. Overall it is not calculating properly. Please fix! or go back to older version until you can fix these bugs. very disappointed right now.

This app went downhill dramatically. It used to be a really good app. It is no longer user-friendly. It is extremely clunky & very complicated. there is no way to turn off the annoying extremely loud alarm that goes off. If you set the timer for 60 minutes, it will cut off at 30 minutes no matter what. You can no longer just set a session and hit stop when you are done. and if you give them a bad review they will block you from being able to use the app which is fine cuz it doesn't work!

What’s new

• Time to MED now on the home screen (the amount of time your skin will produce vitamin D, or 2× if you turn over for a max session) — inside the solar arc, next to your sun angle. No need to open the timer.
• Personalized weekly goal on Progress — based on your target blood level, not a generic number.
• Fix: vitamin D intake estimates no longer apply a BMI multiplier.