I use a iPad Pro 9.7. Only for flying. It’s great no problems. For a few more buck you could get Crystal Sky. That’s what I want.I'm currently using an old Samsung note 3 that is currently working flawlessly (aside from OTG) issue.
I am trying to hold off on a crystal sky due to the costs of getting one.
Does anyone recommend a specific iPad or any other device? I heard iPad mini 4 is usually a choice but wanted to see what other options there are... I will probably pick one up used but before I do I want to make sure there are other options.