Apple has unveiled a new version of the operating system which powers iPhones and iPads.

The tech firm revealed iOS 12 at WWDC, its annual gathering for the developers who build apps and other software.

When the software goes on general release later this year, users will be able to have group Facetime video chats.

They will also have access to a new range of emojis as well as fresh animoji and personalised animated icons called Memoji.

The operating system will boost the performance of devices,, which means Camera launches up to 70 percent faster, the keyboard loads 50 percent faster and typing is more responsive.

It will work from any phone made after the 2013 iPhone 5S.

The software will be available for beta developers later this month and will be released to all users in the Autumn.

‘We’re very excited about the new communications features we’re bringing to iPhone and iPad with Memoji, a more personal form of Animoji, fun camera effects and Group FaceTime,’ said Craig Federighi, Apple’s senior vice president of Software Engineering.

‘With iOS 12, we’re enabling new experiences that weren’t possible before.

‘We’re using advanced algorithms to make AR even more engaging and on-device intelligence to deliver faster ways to get things done using Siri.’