The 9th generation Apple iPad, also known as the iPad 10.2 (2021) is probably the Cupertino tablet that needs the least introduction. It has remained a staple of the company's lineup, technically dating back all the way to 2010. Way before any mini, Air or Pro hit the scene, as clearly evident by the formidable 9th iteration mark.
Apple introduced the iPad Air 4 in September 2020 as the next evolution of the non-pro tablet line. It has a 10.9-inch edge-to-edge display, Touch ID in the power button, and powerful A14 Bionic processor. It also adds support for the Magic Keyboard, second-generation Apple Pencil, and USB-C.