Apple s biggest announcements at WWDC 2013

Apple on Monday unveiled new mobile software that it described as the most revolutionary overhaul of its operating system since the iPhone was introduced in 2007, sporting a revamped layout with fresh colors, new animation and more depth to its display.

As Apple kicked off its annual conference in San Francisco for its developers, executives also showed off a new line of Mac computers and said that updated Siri voice software used on the iPhone now incorporates Microsoft's Bing search engine.

Called iOS 7, the smartphone and tablet platform redesigned by resident creative honcho Jonny Ive comes with a new edge-to-edge look that uses translucency to highlight underlying content, new typefaces, and new icons.

Kleiner Perkins venture capitalist Matt Murphy, who runs the firm's iFund, tweeted that the new iOS platform "Looks livelier, happier, approachable."

It will also support multitasking for all apps, executives said. "It's the biggest change to iOS since the iPhone," said CEO Tim Cook.

Apple also said that Siri, the voice-activated personal digital assistant, comes with all new male and female voices, a new look, and is now directly integrated with Bing.

Some industry experts have criticized Apple's mobile operating software, which has retained its general look and feel since its inception, for looking somewhat dated.

My ass

Marketing chief Phil Schiller offered the audience a sneak peek at Apple's upcoming new Mac Pro - its top-of-the-line computer with a sleek cylindrical chassis that he said will feature several times the processing and memory speed and power of the previous generation.

It will be released later this year and be assembled in the United States, Schiller said.

Apple's stock has fallen 37% after touching a high of $705 in September as competition in the key smartphone market escalated. Some investors believe the company that invented the iPhone is struggling to come up with original new products after co-founder and former CEO Steve Jobs died in 2011.

"Can't innovate any more, my ass," Schiller said as he showed off the new Mac Pro. "This is a machine unlike anything we've ever made."

Apple also announced a new operating system for the Mac PC called OSX Mavericks, moving away from its penchant for naming its computer software after big cats. The new OS can handle multiple display and "tagging" of documents, among other new features.

In an unusual move, Apple also shared the stage with little-known startup Anki, which was given the opportunity to show off a game.

The conference, whose tickets sold out in just over a minute when it opened up in April, comes as South Korean rival Samsung Electronics has solidified its lead in the smartphone market with a 33% share followed by Apple with 18% during the first quarter, according to market research firm IDC.

Cook is under pressure to show that the company that created the smartphone and tablet markets is not slowing down as deep-pocketed competitors such as Samsung and Google encroach on its share.

Investor concerns center around whether Apple will be able to come up with more groundbreaking products as smartphone and tablet market gets more crowded.

In April, Apple reported its first quarterly profit decline in over a decade.

Cook told the audience of developers at the Moscone Center in San Francisco that Apple's App Store now has 900,000 apps, which have been downloaded a total of 50 billion times.