Apple's new iPad Air and fifth-generation iPad mini both work with the Apple Pencil, but are limited to the first-generation Apple Pencil rather than the second-generation model, which only works with 2018 iPad Pros.
If you're looking for a more affordable alternative, though, it turns out both new iPad models are compatible with the Logitech Crayon, an Apple Pencil-like stylus that previously was only compatible with the sixth-generation iPad.
Apple updated its online store listing for the Crayon following the launch of the new iPad models, noting compatibility with both.
Priced at $70, the Crayon is a lower-cost alternative to the Apple Pencil that works in the same way. It features a slim aluminum body and Pencil-like tip, with palm rejection and the same latency and tilt that you get with the Apple Pencil.
It does not, however, feature pressure sensitivity support, so that's one feature you'll miss out on choosing the Crayon over the Apple Pencil.
Logitech designed the Crayon for students (and schools can buy it for just $50), so it has a flat surface to prevent rolling, a tethered rubber end cap, a grip that's meant to be comfortable for small hands, and it's durable enough to withstand drops of up to four feet.
The Crayon charges using a built-in Lightning port, so you can use a standard Lightning cable to charge it up. The battery lasts for approximately 7 and a half hours before needing to be recharged. No Bluetooth pairing is needed to connect the Crayon to an iPad - it works automatically.
Logitech's Crayon is available from the Apple online store and in Apple retail stores.