My oldest (12) likes to draw, and is currently using a free version of ibisPaint on her phone.

What's a good upgrade to that?

I'd love to get her a tablet + pencil, but I'm not quite ready to shove an overpriced Apple thing in her hands. But I also want to encourage her and not give her crappy tools/software.

@pixelambacht My daughter is still getting mileage from a 5+ year old iPad Pro (from before the base models could use a pencil) and this: https://procreate.com. A second hand iPad (Air/Mini) might get the job done.
Procreate — Creative apps designed for iPad

Powerful and easy-to-use drawing and animation apps, made for both creative professionals and aspiring artists. Pay once. No subscription.

Procreate
@acco_san I see a lot of ProCreate usage there, but not entirely sure I wanna help lock her in to the Apple ecosystem. Definitely #1 for the premium option!