Microsoft's smartphone share in Vietnam has grown substantially, reaching 16% in 2013 and 24% in 2014. Windows Phone 8.1 now accounts for 65% of Windows Phone downloads, while Windows Phone 7.x accounts for less than 5%. Paid apps generated 20% of developer revenue in August 2014, dropping to 11% by November 2014, and Microsoft provides various forms of support for app developers, including through programs like BizSpark and contests.