If you have previously activated the backup function of your Apple account, heylogin uses this as an end-to-end encrypted backup mechanism.
You need to log in to a new smartphone with your old Apple account to restore heylogin.
End-to-end encryption
heylogin uses Apple’s end-to-end encrypted backups. This functionality uses the iCloud’s end-to-end encryption mechanism. For more information, consult our security whitepaper.