Android users have long complained that texting someone with an iPhone on iMessage is an unpleasant experience. The Justice Department argues it is also an example of anti-competitive behavior.
The maker of Fortnite sued three years ago, alleging that Google abused its power to shield its Play Store from competition in order to protect a gold mine that makes billions of dollars annually.
Google has called on Apple to adopt RCS, a new messaging service that is increasingly used on Android devices. The iPhone maker, which uses its own iMessage service, hasn't budged.