idk if they stay compatible, i'd go to the saves folder, transfer to phone via dropbox, other clouds or such, and move it to whatever place renpy stores the gayme's saves in on the phone (make a save on there first so the gayme creates a folder and is easier to find, if that's how the phone manages it).
if saves are in the .save format over there too, they probably work... otherwise, try the new renpy sync function, enable it in preferences (in the game), save and try, there should be a way to get a code to access your saves from a different device, look it up, i never tried it personally.