Project Sandcastle is described as 'Linux with X windowing system and Android on the iPhone' and is a Mobile OS in the os & utilities category. There are more than 25 alternatives to Project Sandcastle for a variety of platforms, including Linux, Android, Linux Mobile, Android Tablet and Self-Hosted apps. The best Project Sandcastle alternative is Android, which is both free and Open Source. Other great apps like Project Sandcastle are LineageOS, /e/, Ubuntu Touch and Replicant.
Open-source mobile OS developed by Google, based on the Linux kernel. It supports app development in Java and Kotlin. Compatible with various devices, offering seamless integration with Google services, customizable interface, and extensive app ecosystem for smartphones and tablets.
United States
Free and open-source Android-based operating system for smartphones and tablets, designed to enable deep customization, enhanced privacy controls, regular security updates, and broad device compatibility without default proprietary Google services.
United States
/e/ is a fork of LineageOS that aims to be completely free of everything Google. Not only that, but there are a number of goals the developer has in mind for /e/ that more people feel are vital to a mobile operating system.
France
EU
Ubuntu Touch is the Ubuntu operating system for mobile phones originally created by Canonical and now developed by the UBports Community.
GermanyEU
Replicant is a fully free Android distribution running on several devices, a free software mobile operating system putting the emphasis on freedom and privacy/security. It is based on LineageOS and replaces or avoids every proprietary component of the system, such as user-space...
United States
Plasma Mobile turns your phone into a fully open hacking device, just like a PC. You can join us to start building new mobile experiences now.
GermanyEU
Android-based OS emphasizing privacy, open source transparency, tracker and ad blocking, independent app installation, digital sovereignty, community development, routine updates, environmental sustainability, and a familiar interface for alternative Android devices.
FranceEU
iOS is a mobile operating system designed by Apple for its iPhone and iPad devices. It offers a user-friendly interface, intuitive features, and seamless integration with other Apple products. With iOS, you can access a wide range of apps, games, and multimedia content, as well...
United States
alternative, open source version of Fairphone OS, built by Fairphone, that puts transparency and ownership in the spotlight.
Mobian is an open-source project aimed at bringing Debian GNU/Linux to mobile devices.
Sailfish OS is a European alternative to dominating mobile operating systems, and the only mobile OS offering an exclusive licensing model for local implementations.
FinlandEU
Distributed microkernel OS with AI and edge computing capabilities for smartphones, wearables, TVs, tablets, and IoT; features multi-layered architecture, custom device kernels, Linux ABI compatibility, seamless interaction, and resource sharing across devices.
China
Netherlands
