It comes after Spotify complained about a block on telling users about cheaper alternatives to app store.

Margrethe Vestager tells the BBC using AI for decisions that affect lives could lead to discrimination.

Under the rules major firms like Apple and Google would have to open up their systems to rivals.

Barclays, RBS and HSBC are among firms penalised by the European Commission after an investigation.

Facebook, Google and others face yearly checks and limits on what they can do with users' data.