Is Call Blocker safe?

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 onl…

Developer: redv6.com
Category: Phone & SMS
Earliest archived version: 15 Apr 2026
License: GPL-3.0-only (per F-Droid metadata)

02 / Release notes

Release notes from F-Droid

12 Oct 2026

0.3.6

About screen now shows the new developer site and contact email.

Full notes →

15 Apr 2026

0.3.4

- Validates F-Droid automatic update flow via Tags. - No behavior changes for end users.

Full notes →

03 / Package identity

Technical fingerprint

Application IDcom.callblocker

Latest APK SHA-256841694626cf06986f60866394a706520267b11bbc01ab83f95a6a856a10cd871

Signing certificate36:E5:9E:31:E1:75:2E:3D:88:1F:BC:57:43:A3:D0:8A:98:7C:05:0C:EB:C0:06:36:79:9B:0C:D5:C5:C6:BF:76

MIN ANDROID28TARGET34ARCHITECTURE

04 / History

Archive history

2 versions in WIKI archive: earliest 0.3.4 (15 Apr 2026), latest 0.3.6 (12 Oct 2026).

No change in android.permission.* between 0.3.4 and 0.3.6.

05 / Version archive

Documented releases

2 TOTAL

VersionReleasedAndroidArchitecture

0.3.612 Oct 202628+→0.3.415 Apr 202628+→

06 / Safety & access

Safety verdict

Authentic — file hash matches the source indexReview the flags below before installing

IntegritySHA-256 verified vs source

SourceOpen-source · fdroid

Permissions11 declared · 5 sensitive

Signaturepresent

Anti-featuresNo known anti-features

Sensitive accessCALL_PHONEREAD_CALL_LOGREAD_CONTACTSREAD_PHONE_NUMBERSREAD_PHONE_STATE

Declared permissions

android.permission.ANSWER_PHONE_CALLS android.permission.CALL_PHONE android.permission.FOREGROUND_SERVICE android.permission.FOREGROUND_SERVICE_SPECIAL_USE android.permission.POST_NOTIFICATIONS android.permission.READ_CALL_LOG android.permission.READ_CONTACTS android.permission.READ_PHONE_NUMBERS android.permission.READ_PHONE_STATE android.permission.RECEIVE_BOOT_COMPLETED com.callblocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Tracker status: Not assessed by WIKI for Android.

07 / Sources

Evidence ledger

Each entry is a captured public reference backing this record.

RepositorySource package page↗Source codeSource repository↗