Google is easing the purchasing process on Android devices with the launch of Pay with Google. Now you simply choose the preferred credit or debit card you gave Google; authenticate the purchase with a security code or your Android device and then check out.

If you've ever paid for something on your phone or tablet, you know just how frustrating checkout can be. Maybe you had to fill in a bunch of forms. Maybe your session timed out. Maybe you encountered an error and had to start all over again. Pay with Google changes that.

When you pay with Google, you can use any of the credit or debit cards you've added to your Google Account from products like Google Play, YouTube, Chrome or Android Pay. Google sends the merchant your payment info and shipping address using the information from your account - no typing required. Then, the merchant will handle all the details just like any other purchase.

At launch, Pay with Google can be used in the Android app or Chrome browser at the following 15 places, with a dozen or so more listed as "coming soon":

The Google Payment API that enables the improved checkout process was rolled out to developers worldwide at Google I/O in May. Google says it doesn't charge any transaction fee for its use and requires "only a few lines of code" to implement.