Google Pay App is a Substantial Update from Android Pay
Yesterday, Google announced that Google Pay was being officially launched with new branding and app updates. The update to the old Android Pay app is now rolling out and it brings not only a name change, but a substantial user experience update. The first public version of Google Pay for Android is 1.53 and it will replace your Android Pay app on your phone when you get the OTA update.
When you first open the app, you will immediately see the improvements in the app. It has a light theme to it and has a two-tab bottom navigation. The Home screen has a carousel of all of your cards and payment options at the top. Simply slide to the card you want to use while you are paying at a terminal to use that card. If you want to make it your default card, just long press it.