It does one thing and one thing only which is good though at 2 bucks, a bit expensive. It is VERY ANNOYING! I insists on waisting my time over and over and over again. Every single time it starts asking you to join and has a tiny link at the bottom to not join but its not "no"; its "remind later". But thats not the end! The very next screen you see every single time is, really! Signup for free! Now the skip link is in the way upper right and the link directly where the last link was is the join link so when you accidentally click its even more waisted time. There is absolutely no way to say NO once and for all time.