postmarketOS is a free and open-source Linux distribution specifically designed for mobile devices. It was started in 2016 and officially announced in 2017 with the goal of extending the lifecycle of consumer electronics to at least 10 years. Unlike traditional Android-based operating systems, postmarketOS provides users with full control over their devices, ensuring they are not subjected to the privacy issues often associated with targeted advertising and proprietary software. By building on top of Alpine Linux, the project leverages shared components to run on a wide variety of hardware, minimizing the need for highly specific, hard-to-maintain code.

Functionality of the distribution focuses on providing a functional, privacy-respecting environment for smartphones and tablets. It acts as a bridge between specialized mobile hardware and the broader Linux ecosystem, allowing users to run standard Linux software on devices that vendors have long abandoned. The project also emphasizes the importance of upstreaming drivers and improvements to the mainline Linux kernel, which ensures better hardware compatibility and long-term security.

Some of the key features are:

• Mainline Linux Support: Prioritizes using the mainline kernel to ensure long-term device usability beyond vendor support windows.
• Alpine Linux Base: Built upon the lightweight and secure foundation of Alpine Linux for efficiency and stability.
• Multiple User Interfaces: Supports various interfaces including GNOME, KDE Plasma, Phosh, and Sxmo.
• Full Privacy: Designed to be free of tracking and surveillance mechanisms commonly found in proprietary mobile OS ecosystems.
• Device Diversity: Supports a wide array of hardware including smartphones, tablets, and Chromebooks.
• Open Development: All project source code is publicly available and developed with transparency at its core.
• Community-Driven: Relies on a global community of contributors, core maintainers, and trusted developers to manage ports and system components.

Operationally, the project is maintained through a collaborative development model where contributors work on specific device ports, kernel development, and package maintenance within Alpine Linux. Users can install the operating system on supported hardware following guides provided in the project's documentation. The project also maintains its own build infrastructure, which includes automated testing to ensure the quality and reliability of release images. Developers frequently coordinate through communication platforms like Matrix and IRC, as well as through regular blog posts and annual conferences.

Some common use cases include:

• Device Longevity: Extending the life of older smartphones or tablets that no longer receive manufacturer updates.
• Privacy-Focused Computing: Creating a personal device environment that does not track usage or display targeted advertising.
• Linux Development: Testing and developing Linux applications for mobile form factors.
• Embedded Systems: Utilizing supported hardware as low-power home servers or specialized monitoring tools.
• Security Research: Using a transparent, modifiable operating system to conduct security analysis and troubleshooting.