> there is an alternative contact app that doesn't share your data. you can then fill the default contact app with fake data or leave it empty.
You may want to share your contacts with app X but not with app Y, though.
yes, fair point. i solve that by using shelter where the app and a contact app run with an independent configuration. the downside is that i have to duplicate contacts in the shelter vs outside. however that is what i want because not all contacts are duplicated.