Tired of endless spam calls ruining your day?
CallShield is the definitive solution to block phone spam before your smartphone even rings.

WHY CHOOSE CALLSHIELD?
Unlike other apps, CallShield does not upload your contacts to external servers or build shared databases. Your privacy is fully protected: the app filters calls in real time based only on your preferences and local number logic.

MAIN FEATURES
International prefix blocking: The most powerful feature in 2026. Block entire countries with one tap. If you’re not expecting calls from some countries, CallShield will block them for you instantly.

Custom prefixes: Block calls that start with specific digit sequences (2–4 digits after the international prefix). Prefixes are checked independently of country settings, so you get maximum flexibility to filter suspicious numbers or patterns that bother you.

Italian provinces (Italy only): When you allow calls from Italy, you can still filter by provincial area code. Choose which Italian provinces to block or allow (e.g. 06 Rome, 02 Milan): ideal for avoiding telemarketing from specific cities while keeping calls from the areas you care about.

No subscription: Download the app for free and unlock full protection for good with a one-time purchase. No recurring monthly fees.

Full privacy (zero data): We don’t store your data or track your calls. Everything runs on your device using Android’s official Call Screening APIs.

Smart whitelist: Keep your saved contacts always reachable. You can allow only calls from your contacts or build a custom list.

Personal blacklist: Block specific numbers that keep bothering you.

Detailed statistics: See how many spam attempts you avoided today and which countries (and Italian provinces) you block the most.

HOW IT WORKS
CallShield uses native Android technology to intercept incoming call notifications. It checks each number against your rules (Countries, Custom prefixes, Italian provinces, Blacklist, Whitelist) and silently rejects the call if it’s not allowed.

REQUIREMENTS AND NOTES
Works on Android 9 and later.
You must set CallShield as your default “Call screening” app.
Emergency calls (112, 118, etc.) are never blocked.

Protect yourself from aggressive telemarketing and take back your peace of mind. Download CallShield now and block spam calls once and for all.