We use Zuper, too. That means that security and data protection are our highest priorities.
To prove that you are really you (and not an impostor!), we check identity using two different methods.
Safe account log-in with own fingerprint on enabled devices.
We use data encryption with 2048-bit SSL encoding.
We use secure German servers.
Transfer using the same TAN security method as your bank.
Easily connect or disconnect your accounts. No hassles.