I did most of the programming. In the fall of 2011 I inspired my son Matthew to start programming for Android using Eclipse and the Android SDK with the app as the goal. I worked with him to design the way the spinners are used for the unit selections and he developed the Unit Converter. He came up with a slick method to keep everything in metric and to use coefficients where possible. He took my code for a Pitch Speed calculator and did an implementation of it. It was a lot of fun working with him as he was looking at things from a fresh perspective. His school work load got too heavy though in his senior high year and I took over in early 2012. I revised his code to make it more robust and to save state. Plus I worked on making the UI more consistent and I developed 5-6 more calculators. My goal was to get it released in April, but the calculators are challenging to develop with the flexible inputs and unit selections.

RC Calculators does not have a lot of installs. It is a little disappointing as I use the app a fair amount. So I know it is useful. I have a new release ready with a Battery Voltage calculator. I need to get it published.

I am working on more calculators. And I’m working toward being able to do a Windows 8 Store version. I don’t have enough time to do an iPhone/iPad version right now.

Drill Bit Charts is doing pretty well. It should break 1000 installs on Google Play by the weekend. And it has a lot of installs on the Amazon Appstore.

Thanks for the feedback. Comments are welcomed. Suggestions for new calculators or features are appreciated. Even if they are common calculations, having them in the palm of your hand or on your tablet is convenient.