Apple has unveiled one of the biggest gambles in its history with a radical overhaul of its iOS software. The new iOS 7 software has a 'flat design', but critics say the dramatic new look could backfire, confusing users - while others claim it simply looks like Google's rival Android system. It is the result of a huge power struggle within the company, which saw the previous head of iOS, Scott Forstall, outed in favour of British born-designer Sir Jonathan Ive, who oversaw the new software.
