Within the same operating system, you can use Cloud synchronization (iOS – iCloud, Android – Google Drive) found in the menu or settings, 2FAS Backup. Remember to connect to the same Cloud account on every device you’d like to synchronize.

The other way (working across platforms) is to export a backup file with all the tokens/codes to an external device such as a USB stick or Mac/PC (remember to set up a password for it), and import it into a new device. Both export and import options can be found in the menu or settings – 2FAS Backup.