Drill and Tap Tool is an educational iPhone application designed for calculating drill sizes needed for various thread tapping operations. Compatible with iOS 10 and above, this full-version app caters to users who work with Metric and US Standard taps, allowing seamless calculations without manual input. Users can select variables such as thread type, tap size, percentage depth of thread, and through hole clearance, ensuring precise results tailored to their specific needs.

The interface is user-friendly and provides the closest drill bit sizes in Metric, Fractional Inch, and US No./Letter sizes. It covers a variety of thread types including US Standard and ISO Metric threads, as well as pipe threads such as NPT and BSP. This app serves as an essential tool for engineers, machinists, and DIY enthusiasts, offering accuracy and efficiency in threading and drilling operations.