When I hold the home screen on a spot a set of options appears to add to Home. Two of these options say program and widget. To add my calendar app which syncs with my google calendar I had to use widget on the home screen. To add my task app which syncs with my google tasks, I added a program to the home screen.
What is different from a Widget and a program. They both must be programs. Is a widget something which is dynamic all the time, and loads on boot so the viewer can see it on the home screen live and updated like a clock?