[jech]

Oh, fully agreed.

What would be more useful, however, would be the ability to selectively block network connections: for example, to allow the public transportation app to access its API endpoint, but not the advertising and tracking endpoints. I don't think LineageOS allows that, and I don't know if Graphene does.

[rchaud]

You can do that on websites with Firefox and UBO. Unfortunately not many transit authorities consider the website as a firsr class citizen anymore.

[upboundspiral]

Sounds like you want dns that blocks advertsing endpoints. Something like pihole or some other service.