There are a few different methods for OS and app deployment. Mobile phones have app stores, which also have various methods to submit apps. Usually, these are done though a web browser. You should be able to publish apps to the Android, iOS, and alternative OS, such as Jolla's Sailfish, app stores.
You should also be able to distribute your app onto embedded devices, such as Raspberry Pi.
In the next chapter, we will traverse into the brand new technology of Qt for WebAssembly that allows Qt applications to run in a web browser.
