This app was mentioned in 4 comments, with an average of 4.75 upvotes
Play the demo chapters of the Hearts of Iron: War Stories before you buy this game. Both are choose your adventure games, and the demo is free. https://play.google.com/store/apps/details?id=com.pdx.hoi4
Where do you get this game thingy?
Edit: never mind: https://play.google.com/store/apps/details?id=com.pdx.hoi4