Check out Silence. I find it works great. It doesn't contact any external domains when running in the background; runs entirely locally so it can work on Stock Android or GrapheneOS. Inspected it via VirusTotal before installing it, and is clean. You can set it up to block all contacts except for those on your contact lists. It comes with other options as well, depending on your preferences.
Netrics
joined 1 year ago
It's like people forgot there is a bookmark feature in most browsers.