Is the default calendar on my EVO Shift the Google calendar? What I am trying to find is a good Android To Do List software that interfaces with a calendar. I have the Check Mark Pro To Do List software on my phone, and they have a compatible calendar program, but when I went to the GreenBeanSoft website, the maker of the apps, I found a website that looked like it had been made in an afternoon. Am I stuck with the default calendar app, and if I am, is there a To Do List app that interfaces with it. Thanks in advance for any responses or directions for a newbie.