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(Credit: Commonwealth Bank)
Platform: iOS (iPhone)
There are two exciting things about Commbank's new payment app: it allows you to make payments to people via Facebook; and you can buy a case with an NFC chip in it, which will allow you to make contactless, PIN-less payments with the app anywhere that there's a contactless MasterCard PayPass terminal. It'll be interesting to see if this sort of mobile payment takes off.
You can also make payments via text and email through the app, as well as get a quick balance, transfer money and use BPAY for bills.