My contact list offers one indispensible feature --- it supports call filtering.

For years I have run my Android phone continuously in "Do Not Disturb" mode. This mode can be easily configured so you must be on my list in order to ring my phone.

I can still see unknown callers and I can call them back if/when I choose but they don't have the privilege of making my phone ring on demand.

I find that life is better and much more pleasant this way.

Can Calltags do this efficiently without a contact list?