[Facebook page: If you're an Engineer, A Scientist, A Researcher, Or just like Measuring Things. You can use Frank Harr's Conversion App! So, what makes it so special? It's relatively small, doesn't need access to the internet, doesn't collect user data and has no ads and no in-app purchases. That's not special.
Frank Harr: Printer's Pie designed Frank Harr's Conversion--Units and Ratios that falls into the Tools category. This application was downloaded and set up by over 10 users and the latest stable update was on Dec 8, 2018. Users rated the app 4.8 on Google Play.