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SPECIFICTION
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Call Blocker

gitlab.com

Android
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Spec score 7.2 #25 of 41 in Spam Call Blocking Apps

Spec sheet

Purpose
Call Blocker is an Android app to block unwanted calls.Read 11 Oct 2026 · gitlab.com
License
The project says it is licensed under GNU General Public License v3.0.Read 11 Oct 2026 · gitlab.com
Android support
The maker states compatibility with Android 9 through 17 (API 28+).Read 11 Oct 2026 · gitlab.com
Backup
It supports complete backup and restore, with optional AES-256-GCM encryption.Read 11 Oct 2026 · gitlab.com
Backup formats
Backups can be saved as readable JSON or encrypted .cbbk files.Read 11 Oct 2026 · gitlab.com
Backup security
Backups can optionally be encrypted with AES-256-GCM; unencrypted JSON backups are readable.Read 11 Oct 2026 · gitlab.com
Call history
The app can show a history of blocked calls.Read 11 Oct 2026 · gitlab.com
Compatibility
The project states compatibility with Android 9–17 (API 28+).Read 11 Oct 2026 · gitlab.com
Dual SIM
Blocking can be configured separately for each SIM card.Read 11 Oct 2026 · gitlab.com
F-Droid
The maker says the app is being reviewed for inclusion in F-Droid and its status is pending review.Read 11 Oct 2026 · gitlab.com
F-Droid status
The project README says it is pending review for inclusion in F-Droid.Read 11 Oct 2026 · gitlab.com
Languages
The interface is available in Spanish and English.Read 11 Oct 2026 · gitlab.com
Languages and appearance
The interface is available in Spanish and English, and the app forces dark theme.Read 11 Oct 2026 · gitlab.com
Notifications
The maker lists blocked call notifications as unfinished.Read 11 Oct 2026 · gitlab.com
Number blocking
The app can block specific numbers and numbers matching a prefix.Read 11 Oct 2026 · gitlab.com
Permissions
The app lists phone-state, call-log, call-answering, notification, and call-screening permissions with their stated uses.Read 11 Oct 2026 · gitlab.com
Private numbers
The app includes a setting to block private numbers.Read 11 Oct 2026 · gitlab.com
Release limits
The README marks blocked-call notifications as not yet implemented.Read 11 Oct 2026 · gitlab.com

Where Specifiction places it

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