Search, Gmail, Calendar, Reader, Docs and Picasa, easier to use via a touch screen, the hallmark of iPhone’s success. Just over a month after launching Google Apps tailored for the iPhone, Google celebrated the first day of Macworld in San Francisco by adding more speed and an improved user interface to its applications stack Jan 14.

Google said in a statement the applications, including Search, Gmail, Calendar, Reader, Docs and Picasa, are easier to use via a touch screen, the hallmark of iPhone’s success.