kentonv
Lurker
This is a great all-in-one free app for keeping track of the World Cup from start to finish. It's attractive and well laid out, pleasing to use. It's got things categorized in ways that are intuitive to find and follow. Having the separate groupings easily available for referencing in addition to the various stages' matches separated by days makes for a particularly useful way of keeping track of what's going on when. The folks that I've shown it to have all had good things to say to say about it. I didn't check out any of the World Cup related apps that charged money, but I can't really think of anything they'd have that I need that this app doesn't provide.