The game supports binding your account with Facebook, Google Play Game Services and Apple Game Center (depending on which operating system your device uses). This will allow you to play your same Heroes of Dragon Age game across different devices and retain your progress, as well.
Although linking your game to an Apple ID/Google login is not required, we strongly recommend doing so. In addition to the benefit already noted, having your account linked will protect it from being deleted by a device malfunction, restoration, or factory reset. Guest (unlinked) accounts that get deleted in this manner can not be restored. If your account is linked, you can regain access just by logging in.
You can link a single Heroes of Dragon Age game to a Facebook/Game Center/Game Services login. If you have an additional Guest account that you want to link, you can link it to a different login that doesn't already have a game associated with it and then move between accounts by using the log out/log in option from the in-game Help menu.
To play your account on a device with a different OS (Android to iOS or vice-versa), your account needs to use the option to link with a Facebook login. With a game account that's linked to a Facebook account, you can simply login in using the same Facebook account on the other device and it will bring your account up.
IMPORTANT: You may only link *one* HoDA game to an account, that is not already associated with a game, or you may run the risk of losing a HoDA game.