Shield One: Spam Call Blocker

Shield One: The 100% Offline Spam & Robocall Blocker

Tired of "privacy" apps that upload your personal contacts to the cloud and charge you monthly fees? Stop trading your data for a quiet phone. Shield One is a professional-grade, one-time purchase call screener built specifically for users who value absolute privacy.

Zero Internet. Zero Data Mining. Zero Subscriptions.

Shield One operates entirely on your device using Android’s native CallScreeningService API. The app physically lacks the INTERNET permission in its code—meaning your data can never leave your phone. We don't maintain a shady internal database; all blocked calls are cleanly routed to your phone's default Call Log via silent notifications.

Smart Contact Protection

Shield One requests access to your contacts for one reason only: to build an impenetrable local "Safe List." This ensures your active spam filters never accidentally block your family, friends, or colleagues. Because the app has no internet access, your address book is only read locally and can never be uploaded, shared, or monetized.

CHOOSE YOUR PROTECTION LEVEL:

🛡️ 1. SMART FILTER (Targeted Blocking)

Lets normal calls through while acting as a sniper against specific threats:

• Neighbor Spoofing Shield: Taps into your carrier's STIR/SHAKEN verification protocol to detect and drop scammers trying to fake your local area code.

• Known Spammer Block: Drops robocalls and telemarketers flagged by the network as verified spam.

• Hidden/Private Block: Instantly reject anonymous and hidden callers.

🔒 2. MAX PRIVACY (Zero-Trust Mode)

The ultimate lock-down mode. It blocks the entire world, allowing only calls from:

• Your saved Contacts.

• Trusted Area Codes (e.g., your work prefix or toll-free numbers you explicitly allow).

• Allowed Countries (Block the world, but whitelist specific nations).

ADVANCED ARSENAL:

• Emergency Bypass: Safety first. If a blocked number calls twice within 3 minutes, Shield One recognizes it as a potential emergency and lets it ring through.

• International Barrier: Instantly filter out scams originating from outside the US and Canada.

• Snooze Widget: Expecting a delivery or an Uber? Temporarily pause protection directly from your home screen without opening the app.

• Battery Friendly: Since it doesn't constantly ping cloud servers to check numbers, Shield One consumes virtually zero battery power.

Take back control of your dialer. Keep your phone quiet and your data strictly on your device.