I don't. They tend to lock the save file to the game itself. Meaning, a bad update can erase your save file.
It happened with me on Chrono Trigger. Never again.
I dont get porting console games to phone/tab at all. No tactile feedback for the controller is necessarily going to make it a worse experience to play unless the ui and control system is completely overhauled. Sure you can connect a controller to it, but then you might as well just be playing it on a laptop.