dminder by ontometrics is a vitamin D tracking app that uses your phone's GPS to estimate sun exposure and how much vitamin D you can synthesize based on your location. It adds a practical exposure timer and, in the paid version, history management and ongoing level estimates to help you plan sun exposure more effectively.
Pros & Cons
Location-based vitamin D calculation leveraging GPS for personalized exposure
Exposure timer helps optimize vitamin D production
Premium features include history management and ongoing level estimates
Long-standing presence with a substantial user base (over 100k downloads)
Lacks explicit support for tracking other health metrics (e.g., glucose, sleep, weight)
Relies on location data, which may raise privacy considerations for some users
Not ranked in any top lists
About D-Minder
D-Minder is a health & fitness app developed by ontometrics.
Download Statistics
D-Minder has been downloaded 400 thousand times. In the last 30 days, the app was downloaded 2.9 thousand times.
User Ratings
D-Minder is rated 2.47 out of 5 stars. The rating is based on 1.7 thousand ratings.
App Information
D-Minder is FREE to download. The APK download size is 32.85 MB. The latest version available is 10.6.3. The last update was on June 21, 2026.
Technical Requirements
D-Minder requires Android 7.1+ or higher. The app has a content rating of Everyone. The app has been available on Google Play May 2014.
Description
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.
Recent changes: • Fixed the "Connect Health Data" setup screen — you can always continue past it now, and if you've already granted Health Connect access it's recognized correctly instead of wrongly saying no permissions were granted.
Get a detailed PDF report for D-Minder with download trends, rating history,
and key performance statistics — useful for competitive research or tracking your own app.
Learn more
Are you the developer of this app? Join us for free to see more information about your app and learn how we can help you promote and earn money with your app.
I think this is an excellent app which gives you insight to your sunburn risk and vitamin D levels.
★★★★★_LuluBananana· May 21, 2026
Got this app after getting blood work done and finding out I was deficient in vitamin D, about two months ago. I tracked all my sun sessions and supplements and food intake up until now. Just a few days ago I got blood work done again, and I am no longer deficient! The app was also exactly right in its estimation of my vitamin D level. The only complaint I have is that once or twice the estimated level would jump way, way up randomly. Also inputting my lab results threw the estimated level way off
★★★★☆jelisaveta petrovic· May 23, 2026
I've been using this app for I think almost 10 years, BUT why with the newest update, did you make it impossible to put in the true previous sun session time length?? Instead it's maxed at 2h? I preferred the previous older looking version, it had more functionalities
★★★★★A Google user· Jun 7, 2025
This is a GREAT tool to know when to be outdoors for optimal vitamin D. I use this every day, and now I know from November until the end of January (in my area) that I will need to use my vitamin D lamp since it is not available outdoors during those months. Great job to the developers. Highly recommend!
★☆☆☆☆Roberto V.· May 10, 2026
It used to have an old UI, but it worked. Now, half of the buttons stop working randomly. I can't stop my session.
★★☆☆☆Matthew Souter· Apr 5, 2026
As others have said, the new version is broken. It's not unusable in that you can sometimes see how much vitamin D would be generated, but you can't start sun session. I don't know why you would release what appears to be a purely cosmetic update without first testing it.
★★☆☆☆Erik Hunsaker· Apr 23, 2026
Loved it; have over a year of history. But may have to give it up. The IU computation for sun sessions is messed up with the update (30 min, solar noon, 90% exposure gives 1000 IU???). A couple of days ago I did less and got 5000 IU. Hope I can find something else...
Google Play Rankings for D-Minder
This app is not ranked
Technologies used by D-Minder
26 permissions·21 libraries
Subscribe to see full permission and library details
Trust & Safety: Requests location (coarse and fine), internet, storage, and ad-related IDs; uses Google Maps integration and a foreground service. This reflects standard permissions for a location-based health app with ads and map features.
Back to top
AppBrain Intelligence premium content
Subscribe now to get full and unlimited access to AppBrain Intelligence.
You'll have access to:
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
