iPad 9.7 works great for me. After this update, it gets laggy at times... but this update was awful, & laggy for everyone it seems, so I’m pretty sure it has nothing to do with the device.
I use an iPhone 6s an iPhone x and an iPad (not sure which) but as long as there is enough space on the tablet or whatever you want to download it will be good. Just remember to have lots of gigs of storage, good wifi (this game drains data), and whatever is your preference