Please follow these steps to transfer your data via local backups from Android to your iPhone/iPad:
Send the backup from your Android device to your Mac, f.e. via Email: Settings > Backups > select backup of your choice > share
Share backup via email
Install Outbank on your Mac
Open the email on your Mac, click on the backup in the attachment and choose Outbank to open it
Enter the App Password which was used to create the backup on your Android device.
Important: Log in again with your Outbank ID after restoring a backup.
In case you use the data synchronisation between multiple devices, please reset the 'Secure Sync'. Every step of the way is described here: https://help.outbankapp.com/en/kb/articles/wie-kann-ich-den-secure-sync-zur-cksetzen-5
Tip:
The Secure Sync allows you to synchronize your data across different devices without manually editing and adding data. Read more about this here:
https://help.outbankapp.com/en/kb/articles/wie-kann-ich-mit-dem-secure-sync-auf-mehreren-ger-ten-parallel-nutzen