SpamBlocker

Spec sheet

Purpose

SpamBlocker blocks unwanted calls and SMS without replacing the default call or SMS app.Read 11 Oct 2026 · github.com

Integrations

The app can use downloadable spam databases such as the FTC Do Not Call registry and query online services such as PhoneBlock.Read 11 Oct 2026 · github.com

Privacy

The README says offline features collect no data; for online features the API server sees the IP address, TLS/TCP fingerprints, and reported number.Read 11 Oct 2026 · github.com

License

The project is released under the MIT License.Read 11 Oct 2026 · github.com

Call filters

Call filters include contacts and contact groups, STIR/SHAKEN, repeated calls, emergency calls, meeting mode, and time-based rules.Read 11 Oct 2026 · github.com

Call handling

For calls, the app works as a Caller ID app and does not need to keep running in the background after setup.Read 11 Oct 2026 · github.com

Distribution

F-Droid lists version 5.18, added October 3, 2026, for Android 10 or newer and four Android CPU architectures.Read 11 Oct 2026 · f-droid.org

Known limitations

The project lists no plan for automatic SMS clearing, RCS support, or Android 9 and earlier.Read 11 Oct 2026 · github.com

Permissions

The project describes all listed Android permissions as optional and explains they support features such as call control, contact matching, SMS screening, and calendar-based rules.Read 11 Oct 2026 · github.com

Reporting

Users can automatically or manually report numbers to crowd-sourced databases.Read 11 Oct 2026 · github.com

SMS behavior

SpamBlocker takes over SMS notifications, so users should disable notifications from their SMS app to avoid duplicates.Read 11 Oct 2026 · github.com

SMS filters

SMS features include blocking OTP floods, spam database checks, and training a local AI spam SMS filter.Read 11 Oct 2026 · github.com

SMS limitation

The app's SMS log contains received messages only, not sent messages.Read 11 Oct 2026 · github.com

Plans and prices

Every SpamBlocker plan and price →

Where Specifiction places it

• Call blocker apps#23 of 417.5
• Spam Call Blocking Apps#26 of 417.2
• Call Blocking Software#11 of 147.2