SAN FRANCISCO--On the second day of Google's developer conference here, the Google team announced a feature that lets developers add one-touch in-app purchasing to their Chrome Web Store apps, using Google's payment system.

Now with a single click, app users can make a purchase and then jump right back to the application, be it a comic book, game, or whatever else.

In addition to making it easy for users to make one-touch payments, said Google's Vikas Gupta, the company wanted to make it simple for developers to add the feature--it requires the addition of only a single line of code.

Google also wanted to make sure the pricing was right to enable developers to build businesses on these apps. Google takes 5 percent of each purchase--far less than the 30 percent fee Apple charges.