The European Commission has fined Apple over €1.8 billion for abusing its dominant position on the market for the distribution of music streaming apps to iPhone and iPad users (‘iOS users’) through its App Store. In particular, the Commission found that Apple applied restrictions on app developers preventing them from informing iOS users about alternative and cheaper music subscription services available outside of the app (‘anti-steering provisions’). This is illegal under EU antitrust rules.
This is some of Apple’s own terminology. It applies to any application who’s main purpose is to serve up audial, visual or text-based media.
Apple allows these apps to access existing accounts via apps but not create new ones.