BlackBerry was initially very successful with its secure push email technology and QWERTY keyboards, becoming popular among business users in the 2000s. However, its market share declined after 2007 with the launch of the iPhone, which had a touchscreen interface and app ecosystem. BlackBerry was slow to respond and its Storm touchscreen smartphone in 2008 was buggy. It continued losing market share to Android and iOS devices in subsequent years. Attempts to revamp its platform and devices like the Q10 were not enough to stop the decline. By 2013, BlackBerry's revenues had fallen significantly year-over-year across all regions as its subscriber base dwindled.