The app store ecosystems have provided a dramatic shift for developers of independent apps, with large revenues coming from direct sales, advertising, and in-app purchases. Delphi offers direct support from the IDE for Apple iOS App Store, Google Android Play Store, and Microsoft Windows 10 Store. This session covers the overall ecosystem, mixing general information and some direct experience, and highlights Delphi features supporting stores, and suggestions and best practices for using them and making a business from the app store ecosystems.