To note: I do play the smartphone game.
I have beaten all of the stories, tried all of the modes, and have completed all of the side-battles.
I've not completely, completely finished the game as in, 100%, but the only thing left is to listen to all of the short stories, so I think I can give my impressions of the game now.
Also, to explain the game, I'll be using the main image below to go over each mode.