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Halcyon 15.1 (viola)

A beautiful and secure operating system that puts you in control. Simple, unique, and designed for the modern age.

Features

Make your device look and feel great again

Redesigned Settings

We've redesigned the most used menu on your device for better usability and aesthetics.

New way to personalize

Customize your device with your own icons, wallpaper, colors, and more.

Always up-to-date

Security patches and updates are merged as soon as possible to keep your device secure.

Enhanced security

Built with security in mind, protecting your privacy and data at all times.

About Halcyon

In the ever-evolving world of custom ROMs, Halcyon emerges from the ashes of conquerOS, our previous project built on the CodeAuroraForum (CAF) or CodeLinaro (CLO) base. While CAF/CLO served us well for many years, recent developments prompted us to forge a new path. Halcyon retains the spirit of conquerOS, offering a familiar foundation, but breaks free to integrate the latest features from the wider Android development community. As always, stability and quality remain our paramount concern.