Free & open source ยท Android 10+

Silence the spam.
Keep the peace. ๐Ÿ›ก๏ธ

A blazing-fast, privacy-first Call & SMS blocker for Android. No ads. No tracking. No nonsense โ€” just quiet. ๐Ÿ“ต

๐Ÿ”’ Zero data collection โšก 20+ smart filters ๐Ÿ†“ 100% open source
๐Ÿšซ Spam blocked โœ… Contact allowed Spam Blocker app screenshot
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Smart filters
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Ads & trackers
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Open source
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Android version

Loaded with power

Features you'll actually use โœจ

Block the junk, keep what matters โ€” with context-aware filters that understand real life.

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Regex Rules

Match numbers & message content with full regular expressions. Power-user heaven.

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Contacts & Groups

Allow saved contacts, groups, and even number-prefix ranges automatically.

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STIR/SHAKEN

Catch spoofed callers that fail caller-ID attestation.

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Repeated Calls

Let genuine urgent callers through when they ring back quickly.

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SMS Bomb Guard

Shut down continuous OTP message floods before they bury you.

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Instant Online Query

Check incoming numbers against live databases like PhoneBlock in real time.

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Meeting Mode

Auto-decline calls while you're in an online video meeting.

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Off Time

Always-allow windows for the hours you know spam won't come.

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Crowd-sourced Reports

Report spam to shared databases โ€” protect yourself and everyone else.

No app-replacing required

How it works ๐Ÿง 

It runs alongside your existing dialer & SMS app. For SMS, pick the mode that fits you.

๐Ÿ“ž Calls
๐Ÿ“จ Standalone SMS
๐Ÿ›ฐ๏ธ Screening SMS

๐Ÿ“ž Works as a Caller ID app

For calls, Spam Blocker acts as a Caller ID service โ€” screening and identifying callers without ever replacing your phone app. Kill it after setup; it doesn't need to stay running. ๐Ÿ”‹

๐Ÿ“จ Standalone Mode

The app takes over SMS notifications (disable notifications in your SMS app to avoid duplicates).

Works with any SMS app
Advanced notifications โ€” custom sound, icon, color & LED
Built-in "Quick Copy" for OTP codes
Needs SMS permission; no RCS/MMS multimedia

๐Ÿ›ฐ๏ธ Screening Provider Mode

Works like call screening โ€” your SMS app asks, the blocker replies "block" or "allow".

Notifications stay in your SMS app โ€” feels natural
Works without SMS permission
Better RCS/MMS support
Only works with SMS apps that support the screening protocol

A peek inside

Clean, fast, yours ๐Ÿ“ฑ

Beautiful Material design that gets out of your way.

History
๐Ÿ“œ Call & SMS history
Settings
โš™๏ธ Powerful settings
Notification
๐Ÿ”” Smart notifications
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Privacy is the whole point

For offline features, there is zero data collection. For online lookups, endpoints only ever see your IP, TLS/TCP fingerprint, and the reported number โ€” nothing else. You can even switch the internet off entirely.

๐Ÿšซ No ads ๐Ÿ™ˆ No tracking ๐Ÿ“ด Works offline ๐Ÿ” Reproducible builds ๐Ÿ”“ MIT licensed

The humans behind it

Built with ๐Ÿ’œ

Reimagined, branded & maintained by Julkarnine Rokey and PiTech โ€” building on the great open-source work of @aj3423.

๐Ÿ‘จโ€๐Ÿ’ป

Julkarnine Rokey

Automation Architect & Full-Stack Engineer
๐Ÿข

PiTech

Progressive Information Technology โ€” innovative solutions for growing businesses

Ready for some quiet? ๐Ÿคซ

Download Spam Blocker App and take back your inbox and your ringtone.