You can currently read and backup your amiibo's with Android. You don't need a special app or anything. The "standard" NFC reading/debugging app will let you dump all your info, no problem.
It is currently IMPOSSIBLE to replicate amiibo NFC tags, or to make your own. The NFC tech they use is new and currently secure. It may be broken in the fututre, but you will need to purchase a "magic" amiibo NFC card that can have your backed-up data written to it. Your phone will not be able to do it.
It is currently IMPOSSIBLE to replicate amiibo NFC tags, or to make your own. The NFC tech they use is new and currently secure. It may be broken in the fututre, but you will need to purchase a "magic" amiibo NFC card that can have your backed-up data written to it. Your phone will not be able to do it.