According to reports from 24th May 2011, the day Mango was revealed officially till now Microsoft has approved up to 2000 applications for Marketplace. Windows Phone’s Marketplace took 219 days to reach 20,000 apps since the release of WP 7 while Apple’s iPhone App Store took 215 days and Google’s Android store took 419 days. Win Rumors claim

Marketplace trackers is currently tracking 19,789 apps in the U.S. Marketplace alone. WP7applist is tracking 20,185 applications worldwide and explains 1,166 of them are inactive, 48% are available for free and the average price is $1.45 per paid application. Microsoft’s s Windows Phone Marketplace is growing at an impressive rate. The software giant added 3,000 applications in April alone after reaching its 12,000 milestone in late March. The Marketplace passed 15,000 apps in April just in time for its six month birthday. WP7applist says that 175 apps are updated on average each day. In the last 24 hours, 99 apps were updated and 288 were added.

During the delayed time of NoDo updates the developer’s have been really working hard to develop apps to meet App Store plus giving the UI for Mango.