Most of manufacturer use Android as operating system, Apple use iOS and Huawei is now developing HarmonyOS. But there is also another OS available – Sailfish OS, which is available for selected Xperia smartphones. Sailfish OS is very interesting operating system and you can also run Android applications here. In this article you can see demonstration of Sailfish OS.
Sailfish OS is a Linux-based operating system based on open source projects such as Mer and including a closed source UI. The project is being developed by the Finnish company Jolla. The OS is shipped with the Jolla smartphone and tablet (the sale stopped in 2016 but devices are still supported with software updates) and from other vendors licensing the OS. The OS is ported by community enthusiasts to third-party mobile devices including smartphones and tablet computers. Sailfish OS can be used for many kinds of devices.