http://itunes.apple.com/us/app/kissisland/id416247004?mt=8 Hi honorable TouchArcade community, April 01, 2011, we made our game KissIsland 1.4 available for free and promoted the event where possible (including forums and sites that feature free apps a day). As a matter of fact, KissIsland was free 31 March as well, but we didnt mention a word about it. It was top secret! The outcome was quite a surprise for us: on March 31, the number of free downloads exceeded by far that on April, 1! Was the April Fools Day marked on 31 March this year? How do users get to know about freebies? Which apps are efficient in updating the iPhone/iPad fans? We will much appreciate if you could clarify the situation! Big thanks. P.S. If you wish to test our game, we will be happy to send a promo code http://forums.toucharcade.com/showthread.php?t=89891
There are so many websites that track these "free for a day" and similar events. Like http://appshopper.com/ - there are even app's for this purpose: http://itunes.apple.com/app/appshopper/id387037496?mt=8