About this app

Call Guard blocks incoming calls from numbers not saved in your contacts — silently, before your phone even rings.

Features

Block unknown callers

Any number not in your contacts is automatically rejected. No ring, no notification, no interruption.

Allow calls from multiple regions

Add one or more countries to an allow list — calls from those country codes ring through even if the number is not saved. Search across all countries worldwide. Useful if you regularly receive legitimate calls from unknown local or international numbers.

Blocked call log with search

Every blocked call is recorded with the phone number and exact date and time. Search across all blocked numbers, and tap any entry to see the full call history for that number — including how many times it has called and when.

Call back from the log

Each blocked call entry has a shortcut to pre-fill the number in your dialer, so you can easily call back or save the number to your contacts.

Toggle screening on or off

Disable call screening with a single tap whenever you need all calls to ring through — no need to uninstall or change system settings.

How it works

Call Guard uses Android's built-in CallScreeningService API to intercept calls before they reach you. It checks each incoming number against your system contacts. If the number is not found and does not match any allowed region, the call is rejected silently. All processing happens locally on your device — no data is transmitted to any server.

Permissions

• Read Contacts — to check whether an incoming number is saved in your address book
• Call Screening role — required by Android to intercept and screen incoming calls
• Notifications (optional) — only requested if you enable blocked call notifications

Privacy

Call Guard collects no personal data. The blocked call log is stored exclusively on your device and is never transmitted or shared. There are no ads, no analytics, and no accounts.

What's new (Apr 29, 2026)

• Precise regional blocking: now distinguishes between countries sharing the same code (e.g. US vs Canada).
• Automatic settings migration preserves your allowed regions.
• Improved number recognition: fixed a bug that blocked local numbers from non-contacts.
• Refined call log: now shows country flags and names for each blocked call.
• Performance and stability improvements.