The penalty is for preventing Spotify and other music streaming services from informing users of payment options outside the Apple app store.
The European Commission’s decision was triggered by a complaint by the Swedish music streaming service over this restriction and Apple’s 30% fee.
The EU competition enforcer said Apple abused its dominant position in the market for a decade.
Margrethe Vestager said, Apple had done this by "restricting developers from informing consumers about alternative, cheaper music services available outside of the Apple ecosystem.
The difference lies in the fact that you NEED to be on the app store to be on iPhones, and that Apple has a competing service to Spotify (Apple Music) that can be more profitable and easier to sign up for thanks to having no 30% fee