I have added Drill Size Charts to RC Calculators. The updated app is available on Google Play and you can get it now on your Android device. Some screen shots are below.

The app will be updated on the Amazon Appstore in a few days after approval.

I have been working on the web based calculators and have one of them available for people to try out on desktop browsers or on iPads or other tablets. You can go to [link=http://www.rccalculators.com/htmlcalc]www.rccalculators.com/htmlcalc[/link] and try the Unit Converter. These will not be a replacement for the Android or planned iPhone/iPad apps, but will be part of my goal of making the tools available when and where modelers need them. My first efforts had fancy combo boxes. But I found that simple controls work best on the iPad and on Android tablets.

Windows 8 tablet support is already in progress.

RC Calculators is a long term project and your input is appreciated. If there are calculations you do, others may need to do them as well.