I created a google takeout and in that zip file I found some files containing a ton of data about me. It has logged every single page I visited while using the google search engine and chrome browser. It even logged every single time I opened an app on my old android phone. It even has VOICE RECORDINGS of me and a log of every time I used google assistant. This is just some of the data and I’m very sure there is even more data they have.
GrapheneOS has a built in Firewall that doesn’t require root privileges. Also, you don’t trust the GrapheneOS devs who arguably create one of the most secure operating systems on the planet, which is open source and can be verified by everyone, but you trust Calyx devs who regularly go months without releasing any Android security patches and include highly privileged third party apps in their operating system. Makes a lot of sense.
Of course it requires root.
Oh sorry, my bad. I meant it’s not some third party app that has to be installed with root privileges, but rather just a well integrated part of the system, which uses Android’s permission system to deny internet access.