SpamBlocker (Call & SMS)
SpamBlocker (Call & SMS) is a free, open-source messaging app for Android. Spam Call/SMS blocker. It has 1,942 GitHub stars and is released under the MIT license, and you can install it from F-Droid and Google Play.
github.com/aj3423/SpamBlocker (opens in a new tab)
Data as of from the GitHub API and the F-Droid index; description from the project's repository or F-Droid listing. Report an error
About SpamBlocker (Call & SMS)
It blocks unwanted calls & SMS messages without replacing your default call/SMS app. Filters: - Contacts - Contact Group - Contact Prefix - STIR/SHAKEN - Repeated Calls - Dialed Number - Answered Number - Emergency - Push Alert - SMS Alert - SMS Bomb - Recent Apps - Meeting Mode - Off Time - Spam Database - Local AI - Schedule & Calendar - Geolocation & Carrier - Instant Query - Report Spam - Regex - and more...
Privacy and F-Droid
F-Droid builds SpamBlocker (Call & SMS) from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
No anti-features flagged on the latest F-Droid build.
Screenshots
Screenshots from the app's F-Droid listing.
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Is SpamBlocker (Call & SMS) free and open source?
Yes. SpamBlocker (Call & SMS)'s source code is public on GitHub under the MIT license, which is OSI-approved or FSF-free. F-Droid, which builds it from source, flags no anti-features such as ads or tracking on its latest build.
How do I install SpamBlocker (Call & SMS)?
You can install SpamBlocker (Call & SMS) from F-Droid (package spam.blocker) and from Google Play; the links are on this page. Its GitHub repository also publishes releases (latest: v5.19).
Is SpamBlocker (Call & SMS) still maintained?
The repository's most recent commit was on Oct 28, 2026. Its F-Droid listing was last updated on Oct 16, 2026. appsgit only lists apps whose repository had a commit in the last six months.