If you want to play with the "early AF" release of iOS 12, or run around in the deserts of macOS Mojave, you normally have to give Apple $149 for the privilege of developing apps for its platform - apps it will ultimately take a 30 per cent cut of (unless you offer a subscription and keep a user for longer than a year, but now I'm getting minute).

The opening keynote at Apple's annual developer event, the Worldwide Developer Conference (WWDC), has ended. Apple has announced updates to all four of their main operating platforms with lots of new features to macOS, iOS, watchOS and tvOS.

While some of the updates are significant, others are less so, depending on the maturity of the platform. Let's take a look at what's new and when you can get your hands on the new software.