Apple's invitations are out: iPhone 5S and 5C to launch on 10 September

Apple has confirmed what we've all known for weeks, that it will launch its next generation iPhone(s) in San Francisco on 10 September.

Apple is giving little away with this year's invitations, which say simply, "This will brighten everyone's day" on a background filled with colourful bubbles. However, this is a likely reference to the multiple colour versions of the rumoured iPhone 5C, while the invitation's design also echoes the design changes of iOS 7.

While the Cupertino company is giving little away, we already know quite a lot about Apple's next generation smartphones, thanks to months worth of rumours and speculation and a number of leaks.