You can transfer your account to a new device by following the steps below.
 
[Cross-Platform Login]
 ■ Android → Apple cross-linking
 1. From the Settings menu, check if your data is linked with a [Google] account.
 2. From your iOS device, log in with your [Google] account after launching the game.
 
■ Apple → Android cross-linking
 1. From the Settings menu, link your data with an [Apple] account.
  ※ If your account is already linked to Game Center, please make sure to link your Apple ID.
 2. From your Android device, log in with [Apple] after launching the game.
 
※ Note
 1. Please make sure to check your account information before trying the steps above.
 2. If you link a new game account to a Store account that's already linked, the existing account may be deleted
 3. If you initially used a Game Center account to log in, you must use the same Game Center account to retrieve the original data after switching devices.
 
Thank you.