From January 2012 through June 2012, the Windows Phone Store had doubled the number of apps available from 50,000 to 100,000; but 11 months later, it appeared that momentum had slowed to a crawl. By May 2013, 11 months later, the tally was only at 145,000 apps. But this slowdown in momentum has apparently ended...Source: http://www.phonearena.com/news/Windows-Phone-Store-hosts-170000-apps_id46335
