They're accused of restricting developers from using different browser engines, keeping Google as the default search engine, and making exclusive financial deals.

Apple and Google face problems in the UK because of their mobile browsers. A commission of inquiry concluded that they are hindering competition.

Google’s Android mobile ecosystem is also complicit in impeding competition, according to the CMA report, albeit to a lesser extent. The issues flagged by the investigation include Apple requiring all browsers on iOS to run on its WebKit browser engine,

The UK's Competition and Markets Authority (CMA) has determined that the country's mobile browser markets are "not working well for consumers and businesses" and "holding back innovation." Most of the watchdog's ire is directed at Apple for policies such as requiring mobile browsers to use its engine,

Apple and Google have used their mobile web browser duopoly to harm innovation by restricting competitors on their platforms.