Own Your Conversations

💬 Call, text, or video chat privately withSignal.

🔐 Encrypted communication is prioritized and encouraged in the OS.

Access the World's Information

🌎 Browse the internet without censorship usingTor Browser.

🔑 Free and trusted VPNs fromThe Calyx Institute andRiseup included.

Download Your Favorite Apps

📲 Download all of your favorite apps fromF-Droid andAurora Store.

✌️microG replaces some functions of Google Play Services while maintaining much more anonymity and privacy. Completely Optional.

User Personas

Maya Ninova, Ph.D., 2021

We recently conducted a diary study and a set of user interviews and synthesized a baseline understanding of who our users are. Download the research report!

Lessons from CalyxOS signing process redesign

2026-02-10

• This post is based on thetalk our team gave at FOSDEM 2026.
• It provides a deep dive into our HSM-based signing redesign.
• Video recording of this talk is availablehere.

CalyxOS progress report - ceremony preparation, QPR ports, and FOSDEM

2025-12-17

• Our final open HSM-based key provisioning plan is undergoing auditing before the key ceremony
• CalyxOS devices, including extended support, are being ported to Android 16 QPR1 while QPR2 support plan is being developed
• We are improving community support with the new Community Coordinator
• Catch up with us at FOSDEM in Brussels on January 31 2026!

CalyxOS progress report — signing, team capacity, and more

2025-11-10

• CalyxOS is working seamlessly with our security consultants to finalize the HSM signing solution.
• The Calyx engineering is fixing our data infrastructure.
• Three new roles are open for CalyxOS.

Become a Member

CalyxOS is brought to you by Calyx Institute, a 501(c)(3) non-profit dedicated to making privacy and security available for all.

By becoming a member of Calyx Institute, you will support the development of CalyxOS.