Unknown Call Blocker

Name: Unknown Call Blocker
Author: Alpha System BR

LiveAlpha System BR1 app · 3 installsToolsFreecom.alphasystem.callblocker

Automatically block calls and SMS from unknown numbers

Alert me ★ Watch Open in Play ↗

Total installs: 3
Installs / day: ~0
Rating: —★
Released: 29 Sept 2026
Last update: 3 Oct 2026
Countries: —

Install history

exact counter from Google Play

30dAll

Installs per day · last 90 days

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Data safety

declared by the developer on Google Play

No data shared with third parties
No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

6 in 2 groups

1 Sensitive2 Notable3 Routine

What this app can do with your phone

See every contact saved on your phone, including names, numbers and emails

ContactsSensitive1

Access to the contacts saved on your phone

See every contact saved on your phone, including names, numbers and emailsread your contacts · READ_CONTACTS

OtherNotable5

Access to miscellaneous device features that don't fit other categories

Start itself automatically as soon as your phone finishes turning onrun at startup · RECEIVE_BOOT_COMPLETED
Keep your phone's processor or screen from going to sleep, which can use more batteryprevent device from sleeping · WAKE_LOCK
Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
Connect to the internet to load content and send datafull network access · INTERNET
Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description

Unknown Call Blocker intelligently protects you from unwanted calls and spam. The app automatically blocks calls from numbers not in your contacts—no blacklists, no manual configuration. HOW IT WORKS - Any incoming call from a number NOT saved in your contacts is automatically blocked or silenced, depending on the chosen mode. TWO BLOCKING MODES • Aggressive Mode: completely rejects the call and sends it to voicemail • Silent Mode: allows the call but silences the ringtone and vibration (Android 10+) REPEAT CALL BYPASS - If someone calls twice within 5 minutes, the second call is allowed—ideal for emergencies from unknown numbers. SMART DELAY - If you recently called a number, the return call is automatically allowed. Perfect for when you call delivery, a doctor, or service providers. SMS BLOCKING SMS - notifications from unknown senders are silently discarded, without requiring SMS permissions. COMPLETE HISTORY - View all blocked calls and messages with date and time. Swipe to delete individual records. TOTAL PRIVACY - No data leaves your device. No servers, no data collection, no ads. 100% offline and free. LIGHT AND EFFICIENT - Runs in the background using native Android APIs (CallScreeningService). Minimal battery consumption.

What's new

Smart Delay is optional and requires your consent: it allows callbacks within the default 30-minute window from outgoing numbers observed after activation. Records stay on your device, are excluded from backup, and are deleted when you disable the feature. Calls made before activation cannot be recovered.

Growing in Tools

Category →