2005, UOL made its IPO on Bolsa de Valores de São Paulo (BOVESPA). However, the firm went back private in 2012. UOL created the social network UOLK in 2005, which was online until 2008. In the following year, UOL established a partnership with BBC for a website teaching English. UOL also launched a partnership with VideoLog, a video sharing portal. That endeavor ended in 2010. In 2007, UOL established a partnership with Google to improve its search engine and also created UOL Downloads, a website downloads of websites and apps. In the same year, UOL updated the mobile version of its portal, launched a partnership with online game distributor Level Up!Games and launched UOL Economia (UOL Economics), a portal featuring calculators, simulators, and quotations. In 2008 UOL launched Zumo, a technology blog written by journalists that test products and report on Brazilian tech market. UOL also bought Digiwerb, a web and server hosting firm, and launched UOL Mais, a portal offering unlimited space for sharing videos, photos, texts, and, audio recordings. UOL also purchased website and server hosting firm Insite, created an investment simulator in Bolsa de Valores de São Paulo (BOVESPA) and launched a new version of Rádio UOL in 2009. 2010s In December 2010, via its subsidiaries UOL Host Date and DHC Outsourcing, UOL bought Diveo Broadband Network, an American technology outsourcing company. In the following year, UOL launched mobile apps for news to devices iPhone and iPad, GigaMail and UOL Cursos Online, a portal that offers free courses from distance for languages, formal education, extensions and post-graduation degrees To extend UOL's position outside of Brazil, UOL acquired BoaCompra in 2011, Brazil's largest digital goods payments company specializing in monetizing online games in emerging markets. The business unit, now called UOL BoaCompra, works with more than 400 video game companies including Electronic Arts, Valve, Smilegate and Ubisoft; providing localized payment coverage for more than 5,000 online games across Latin America, Spain, Portugal and Turkey. In 2012, UOL expanded its partnership with Discovery Kids, released an online English course, announced UOL Women portal and also introduced an app on Formula 1. In the same year, UOL released UOL Viagens, a portal with tips, routes and news on trips. UOL renewed its portal layout and acquired the hosting of Turma da Mônica portal in 2013. In 2014, UOL launched a mobile app for its chat and was appointed by a