People who go on and on about the Google and Amazon "monopolies" -- which only benefit consumers with low prices and expansive services -- this is what actual monopolistic behavior looks like. Apple controls access to a significant share of the mobile application industry and it directly abuses that market power to harm customers by reducing competition and artificially raising prices. Apple is being sued in both US…
An example of monopolistic Google behavior was when they refused to make a YouTube app for any Windows platform (Win8, and later Win10) - which is fine - but then they also blocked the app that Microsoft itself has developed. Because they control access to YouTube as a service, they could do that. And because YouTube is the place for videos on the Net, it hurt the platform pretty bad.
For example, none of the Google apps I have on my iPad support split-screen.