The US Supreme Court has given the go-ahead for a group of consumers to sue Apple over the price of apps hosted on the App Store.

The lawsuit, which was first filed in 2011, argues that consumers are being overcharged for apps because there is no alternative place to purchase an app and Apple takes a 30% commission. It claims this puts Apple in breach of anti-trust laws.

Apple has argued that it neither owns nor sells the apps itself, instead insisting that it acts as an agent.

Supreme Court judge Brett Kavanaugh, who was controversially appointed by President Donald Trump, voted in favour of the lawsuit. In his reasoning, he said: "Leaving consumers at the mercy of monopolistic retailers, simply because upstream suppliers could also sue the retailers, would directly contradict the long-standing goal of effective private enforcement in anti-trust cases."