Not in the iPad app, I'm afraid. There are issues with adding custom resources on iOS (it's generally unworkable).

However, you can try downloading presets from the Art Supplies forum, open them on the desktop (e.g. in the AR4 demo, if you don't own the program), and copying the settings across. Most tool presets are either just settings you can adjust yourself, or are for things that aren't in the iPad app anyway (e.g. sticker spray).

https://forums.artrage.com/forumdisp...0-Art-Supplies