 Originally launched in April 2004 as a J2ME-only application, it is now available on a number of platforms including Android, BlackBerry OS, iOS, Java ME, Symbian, Windows Phone and Microsoft Windows.It has been the subject of several security and privacy controversies, and was banned in India on June 29, 2020, shortly after the 2020 China–India skirmishes.UC Browser is a cross-platform web browser primarily targeted at mobile phones.