Telegram, the messaging app, has become the latest company to file a formal antitrust complaint to the EU over Apple’s App Store.

In a complaint to EU competition chief Margrethe Vestager, Telegram, which has more than 400 million users, said Apple must “allow users to have the opportunity of downloading software outside of the App Store.”

In June, Ms Vestager announced two antitrust investigations into Apple, one of which concerned the App Store. Apple’s conflicts with developers over the rules of the App Store have also escalated recently.