Phoenix OS is a free and open-source operating system that is based on Android 7.1 (Nougat). It is designed to run on x86 and x86_64 architectures, making it compatible with a wide range of devices, including older laptops, desktops, and netbooks. Phoenix OS is developed by a team of enthusiasts who aim to provide a fast, stable, and secure operating system for devices that are no longer supported by their manufacturers.