Android Pay is finally here and it's pretty much everything we expected it to be. While there are plenty of questions about where we can use it, which credit cards can be set up, and why it's so aggressive with brightness even when barcodes aren't on screen, the actual act of spending money is about as straight-forward as it could be. As it turns out, there's one feature Google hasn't really discussed yet, but it could become the best thing about using a phone to buy things. Android Pay can automatically redeem special offers, submit account details for loyalty programs, and make a payment in just one tap to a payment terminal.

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