hey i downloaded infinite painter bc i saw that's what you use and it's fantastic!!!!!
It really is!!! and pro tip, infinite painter is super good at emergency saves. if it crashes it automatically saves your piece as a last ditch effort before itll let itself be shut down. which is why you should never manually close the app when its frozen, it might take a few moments but Trust me it's worth letting it process. Also! after a crash, when you load back in it might look like it hasn't saved anything, Dont close the app or start working again, go to the "open" option to get to the project menu, press discard when it asks you if you want to save your changes, and then open the file from the project menu, it'll almost always be where you left it before the crash! this doesn't work 100 percent of the time, but 70 percent it does work is a Life saver. but also save frequently and stuff.
Oh! and sometimes the menus can be a little fucky in portrait mode, so just rotate your device to landscape and you'll find the Fun Hidden options, like the distort and warp transform tools, and the different gradient styles, Oh and you can make your own custom brushes, that's something that's worth messing around with!