Nextcloud, self hosted. But it is maybe overkill, unless you need it otherwise, for family photo album, docs or such. Davx5 also needed on android. Thunderbird for desktop calendar client. Can recommend etar for android calendar app.

I have understood they use their own index already, like Qwant, and Bing to add to it.

Ecosia has it’s own index with qwant so this is not entirely correct

Removed by mod

Removed by mod

It’s fossify now. Check them out! Original was sold afaik! So steer clear

Seems that is not true. Apps will see inside profiles as far as I know.

I think home assistant + the home assistant app will do this, although i have disabled map etc from HA so I dont have 1st hand experience. You need to self host HA and establish a connection either with nabu casa cloud or a vpn setup (it’s quite easy to set up wireguard on HA)