H5OS is described as 'mobile OS based on Firefox OS developed by Acadine Technologies' and is a Operating System in the OS & Utilities category. There are more than 10 alternatives to H5OS for a variety of platforms, including Linux, Android, Self-Hosted solutions, Linux Mobile and Android Wear. Most alternatives are Operating Systems and Mobile Os. The best alternative is Android, which is both free and Open Source. Other great apps like H5OS are Plasma Mobile (Free, Open Source), iOS (Free), Sailfish OS (Free) and Tizen OS (Free, Open Source).
iOS is a mobile operating system developed by Apple Inc. and distributed exclusively for Apple hardware. It is the operating system that powers iPhone, iPod Touch, and formerly iPad. Each main version of iOS / iPhone OS has introduced a big, main feature of the new version.
An AOSP based ROM which provides stock UI / UX with various customisation features along with the Substratum theme engine. The project has been made by cherry picking various commits from various other projects.
Astian OS is an operating system that is based on the discontinued Firefox OS, development by Astian Foundation, thus allowing support for mobile devices, TV's, and other devices. Astian OS is completely free and open.
webOS is a web-centric and usability-focused software platform for smart devices. The operating system has constantly evolved, passing through its journey from Palm to HP, and most recently to LG Electronics.