Best Mobile SDK Products in 2025

GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.

Key GrapheneOS features:

Enhanced Privacy Security Focus Regular Updates Open Source

Open Source

Privacy-focused operating system for smartphones based on Android and microG.

Key CalyxOS features:

Privacy-Focused Security Enhancements De-Googled Experience Compatibility with Android Apps

Operating system for smartphones and tablet computers, based on the Android.

Key LineageOS features:

Open Source Privacy Customization Regular Updates

A real Linux distribution on the phone.

Key postmarketOS features:

Long-Term Support Privacy and Security Open Source Wide Hardware Support

Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.

Key Android features:

Customization Diverse Hardware Options Google Services Integration Open Source

Open Source

Read more about Ubuntu Touch. Our free and open source mobile OS is made and maintained by UBports! We care about your freedom and privacy.

Key Ubuntu Touch features:

Open Source Privacy-focused No Bloatware Convergence

A free-as-in-freedom re-implementation of Google’s proprietary Android user space apps and...

Key microG features:

Open Source Privacy Lower Resource Usage Customization

Open Source

/e/ is a fork of LineageOS that aims to be completely free of everything Google.

Key e.foundation /e/ features:

Privacy-focused Open Source User-Friendly Interface Regular Updates

Blackberry Blend is software that seamlessly connects information between a Blackberry mobile device and a desktop PC or a tablet device.

Key BlackBerry Blend features:

Unified Access Security Productivity Compatibility

A mobile operating system divested from the norm.

Key DivestOS features:

Privacy-focused Security Enhancements Extended Device Support Open Source

Open Source

Plasma Mobile turns your phone into a fully open hacking device, just like a PC.

Key Plasma Mobile features:

Open Source Customizability User Privacy Integration with Linux Ecosystem

Replicant is a distribution of Android that is 100% Free Software.

Key Replicant features:

Open Source Privacy and Security Community-Driven

Resurrection Remix ROM is ultimately full featured, stable and combined with the best features of...

Key Resurrection Remix OS features:

Customization Feature-rich Experience Regular Updates Performance Enhancements