For sketching, either the pen or puck is used ... Tablets typically support two modes of operation. "Digitizer mode" creates a one-for-one correspondence between tablet and screen.
In 2018, the SonarPen debuted as a cheaper alternative to the Apple Pencil by using audio signals transmitted to the iPad ...
Digitizer tablets or graphics tablets are pressure-sensitive data input devices that allow users to select and draw images with a special pen called a stylus or a mouse-like device called a puck.