Unknown call blocker
Block Unknown Callers on Android
DenyCalls can screen incoming calls against the trusted contacts approved on your device. This puts you in control without trying to identify the person behind every number.
What is an unknown caller?
For DenyCalls, an unknown caller is an incoming number that is not on your approved contact list. It is a list decision, not a spam classification.
How DenyCalls blocks unapproved calls
Android gives DenyCalls the call-screening role. With protection active, the app checks the incoming number locally and can block it when it is not approved.
Allow calls from people you trust
Select contacts who should be able to reach you. You can update your choices when family, work, school, or healthcare contacts change.
Who can benefit from blocking unknown callers?
People who want fewer interruptions, families managing a child's phone, and older users who prefer a smaller circle of approved callers may find this approach useful.
Ready to choose who can call?
Download DenyCalls for Android and build your trusted-contact list.