Commbank's latest mobile banking app opens up tap-and-go payments for Android phones, replaces the need for a pay sticker for phones, and launches a further assault on cash payments.

The bank's latest Tap and Pay app, released on Wednesday, is available for all brands of Android phones with near-field communications (NFC) running 4.4 and above. In the past Android phones other than Samsung Galaxy S4 and S5 required a bank-issued PayTag sticker.

iPhone users will still need the Commonwealth PayTag sticker for now.

But it is now a clunky process. The app requires a PIN to be used for every transaction, not just those above $100.

The bank has worked with MasterCard to deliver the mobile payment solution which relies on technology known as host card emulation (HCE) to transmits payment information and replace the 16-digit number of a credit or debit card with a 16 digit unique token to secure each transaction.(Tokenisation is also a key feature of the ApplePay service which is yet to launch in Australia).