Apple's iPhone might be seen by many as largely a consumer device, with games and media apps regularly topping the 'What's Hot' list on iTunes. However, the App Store currently stocks more than 2,000 business apps and, with the iPhone currently dominating around 13 percent of the smartphone market, the device's potential as a business tool can no longer be ignored. Silicon.com's Sophie Curtis leads a tour of some of the best business apps that can help turn your iPhone into a portable office.?