My favorite little non-Apple iPad stylus is the Logitech Crayon. It doesn't have pressure sensitivity, but it's fast, responsive and supports tilt...and doesn't require Bluetooth pairing. The Crayon was only compatible with the 9.7 inch iPad last year, but iOS 12.2 has added support for Crayon to other iPads, too.
I just downloaded iOS 12.2 and tried Crayon with the new iPad Mini and the 2018 11-inch iPad Pro, and it works just fine. Logitech confirmed to CNET that the Crayon officially works with the new iPad Air and iPad Mini, the 9.7-inch iPad and last year's iPad Pros... in other words, all the iPads Apple currently sells. (I haven't tested on older models.)
iOS 12.2 brings support for @logitech Crayon. Previously only worked on iPad 9.7. Trying it on iPad Pro... pic.twitter.com/5kPb7CBDgo
— Scott Stein (@jetscott) March 25, 2019
The Logitech Crayon ($70) costs less than the Apple Pencil, and unlike the new and old Apple Pencils, you can use it across Lightning and USB-C iPads (it charges via a standard Lightning cable).
As a result, this might be the most universal and affordable iPad stylus of the moment.
Originally published March 25, 1:36 p.m. PT
Update, March 26: Adds that Logitech confirmed compatibility across other iPad models.