Claire McKinnon, ASB acting executive general manager, said its app streamlined the process of applying for an account making it quicker and easier.
"Providing more choices about where and when our customers can join ASB by using this biometric technology has been an exciting innovation."
The process works by using facial biometrics to compare the photo ID with the selfie ensuring they are a match.
It allows new customers to open an account within 15 minutes and start transacting on the same day.
Previously people could sign up online but had to go into a branch in person to prove their identity and address.