Tap And Drill Chart Calculator is an Android app developed by Greg A Miller that provides a convenient way for users to calculate charts for various thread percentages for standard SAE and Metric screws. The app also displays a diagram with the screw threads to check TPI/TPMM and screw diameter. In addition, the app shows the hex nut size for each thread. The best part about this app is that it requires no permissions, making it a secure tool to use.

The interface of the Tap And Drill Chart Calculator app is user-friendly and easy to navigate. Users can quickly access the information they need without any complications. The app is free to download and use, and the developer encourages users to rate the app after evaluating it. Overall, if you're looking for a handy tool to calculate screw threads, Tap And Drill Chart Calculator is definitely worth a try.