The idea behind this application is that it will help you track and manage your Vitamin D.

This new version integrates with the Apple Health app to make seamless data exchange possible in the following ways:

* on setup, profile information is fetched from the Health App if the user allows it
* the user's weight (a factor in D generation) is fetched on an ongoing basis, making it unnecessary to update it
* the app will write vitamin D doses, including session information into the Health app

You setup basic information one time, like your height and weight and skin type and then any time you are outside, during the prescribed hours (and parts of the year), you can have it compute the amount of D you are getting in a stopwatch interface. It will also track how long you can stay out and warn you when the time is up.

The application will notify you with the next opportunity to generate vitamin D.

Each day, you can see forecasts based on your location, and you can also see the solar position, your generated vitamin D vs. target etc.

In the Pro version, you can see your exposures' history and you will be able to schedule future events for next exposures.

What’s New

Version 7.0.0

Finally added back cloud functionality: if you have the upgrade you can sync between devices, and the app will automatically put all your data on the cloud. Please note, per privacy policy, it is in your data directory, we are not getting access to it.

Also some adjustments to estimator for very high doses.

Ratings and Reviews

4.4 out of 5
15 Ratings
15 Ratings
Chuck hiddleston ,

Awesome App!

This app is wonderful, it’s actually motivating me to get sunlight. The app just needs some finishing touches to make it great! Like the Home page with the cloud wallpaper need to be removed or replaced with something better, so we can better see the digits and information. Also when the D timer page is on, I wish I could see how my progress is going, specifically my daily D exposure. Because the time doesn’t show how much D I need for the whole day, it’s just times. So let’s I want to get all my D in one sitting with 100% body exposed, I would mind it telling me that I can with how much time i need in that specific instance. Thanks!

shiftyswifty ,

So helpful!

Could do with a bit of polishing, but overall it’s a really helpful app. As the saying goes, “What you track, you improve.” This app has helped bring much more awareness to the amount of vitamin D I’m getting from the sun each day. It’s great to know when it’s available & how much I’m able to make at different times during the day.
Thanks for making such a useful app! Keep up the great work!

Jetstarfish ,

Easy & Useful

A must for anyone with low D levels. Tells you when D is actually available (spent yrs in the sun at the wrong time of day for VitD), helps you work out how much sun to get & how much skin needs to be exposed. Tracking your levels to give you an idea between testing great. Changed my life!


RobCo, Inc.
44.2 MB
Health & Fitness

Requires iOS 9.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
© ontometrics 2015
In-App Purchases
  1. DMinder Premium $2.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.