Hacking requires iBackupbot and iTunes
1. Download iBackupbot and install.
2. We connect the device to the computer and make a backup to the computer in iTunes (not in iCloud, but locally on the computer)
3. Open iBackupBot and look for a fresh backup we made. Open the branch and go to User App Files> Fallout Shelter> Documents. Next, click the Import button and look for saving (Vault1.sav or Vault2.sav or Vault3.sav)
4. Close the program and restore the device from the backup
P.S. Saves from Android fit iOS, just like iOS to Android.
P.S.S. Any game can be hacked this way..