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Call Blocker

Name: Call Blocker
Author: redv6.com

redv6.com

Block unwanted calls, spam and telemarketing

Communication
FOSS
Free
No ads
No tracking

Android only

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What are these stores? F-Droid, Zapstore

Call Blocker is an app to block unwanted calls on Android. Features: • Block specific numbers • Block by prefix (e.g.: 800 blocks all 800xxxxxxx) • Blocked calls history • Dual SIM support • Backup and restore with optional encryption • No ads, no tracking • 100% open source (GPLv3) Privacy: • No internet connection required • No data sent to external servers • Your blocked numbers are stored only on your device

Developer: redv6.com
Source code: gitlab.com/abelardodiaz/web26-050-call-blocker
Added to AppCosmos: 9 October 2026
License: GPL-3.0-only