postmarketOS is described as 'Extends the free and open source operating system Alpine Linux to run on smartphones and other mobile devices. Alpine is a security-oriented, light-weight Linux distribution based on musl libc and BusyBox' and is a popular Mobile OS in the os & utilities category. There are more than 25 alternatives to postmarketOS for a variety of platforms, including Android, Linux, Linux Mobile, Android Tablet and Self-Hosted apps. The best postmarketOS alternative is Android, which is both free and Open Source. Other great apps like postmarketOS are GrapheneOS, LineageOS, CalyxOS and /e/.
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.
South Korea
AXP.OS is a more private and more secure aftermarket mobile operating system based on AOSP & LineageOS.
The new operating system from OnePlus, based on Android. OxygenOS is light and essential with subtle, useful features.
China
BlissRoms, an open-source operating system built upon Android Open Source Project, that offers a harmonious blend of customization, options, and security features. With a commitment to delivering pure bliss in every build, it brings with it a world of limitless possibilities.
Maru makes personal computing more context-aware by giving you the best interface for your environment. That means when you're on the go, Maru is your phone; when you're at your desk, Maru is your desktop.
India
A security and privacy focused mobile operating system compatible with Android apps. Google-free secure Android for the latest hardware.
Canada
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.
Chile
LuneOS is an open source firmware distribution for smartphones and tablet computers based on the Open webOS mobile operating system.
Xiaomi HyperOS is a proprietary operating system developed by Xiaomi. It's designed to provide an enhanced user experience through its unique features and functionalities. The system integrates seamlessly with Xiaomi's wide range of devices, creating a unified and...
China
KaiOS brings smartphone-like functionalities to affordable phones: the KaiStore for apps. Video calls over 4G. Mobile payments through NFC. Even dual-SIM support.
United States
Oniro is an Eclipse Foundation project focused on the development of a distributed open source operating system for consumer devices, regardless of the brand, model, make.
United States
No frills pure AOSP experience that will not let you down in getting through every day uninterrupted by inconveniences, with just the right dab of customisations. Be it requiring safetynet for banking or payment apps to receiving the latest security patches from Google as soon...
