The app tracks the cards balance and presents an easy "touch and pay" button to call up a barcode.

When ready to pay, customers simply select one of the cards they've linked to the app.

The app also tracks customer visits and shows how close the customer is to receiving discounts and offers.

The log-in screen lets customers link Starbucks gift cards to their app.

Starbucks has maintained the same experience from the iPhone app. A simple barcode linked to a Starbucks card is created by the app for scanning by baristas at the point of purchase.