CalyxOS is a Android-based operating system for select smartphones, foldables and tablets with mostly free and open-source software.
It is produced by the Calyx Institute as part of its mission to "defend online privacy, security and accessibility.
[9] However, in May 2022, CalyxOS announced OnePlus builds were pulled because the bootloader could no longer be relocked on newer device firmware.
[27] In August 2021, Android Authority wrote CalyxOS "puts privacy and security into the hands of everyday users.
With a built-in Datura firewall, VPN and Cloudflare DNS, Calyx promises more security than some other mobile systems.