In changes to be announced at the Worldwide Developers Conference in June, Apple looks set to increase the number of its own Apps available on the App Store, directly challenging Google and Amazon. Changes look likely to increase existing tensions between the Cupertino company and third-party developers.
https://www.notebookcheck.net/Apple-to-take-on-app-developers-with-changes-to-the-App-Store-to-be-announced-next-month.420322.0.html