Block unwanted calls, spam and telemarketing
About this app
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
Compatibility: • Android 9 - 17 (API 28+) • Uses native Android CallScreeningService
Permissions: • Phone: To identify and block calls • Notifications: To alert when a call is blocked
Licensed under GPL-3.0-only, by redv6.com.
What's New in v0.3.4
Imported from the F-Droid repository index.
- Maintenance release.
- - Validates F-Droid automatic update flow via Tags.
- - No behavior changes for end users.
Version history
Apr 15, 2026 · 3.1 MB · Android API 28–34 · code 17
Imported from the F-Droid repository index.
- Maintenance release.
- - Validates F-Droid automatic update flow via Tags.
- - No behavior changes for end users.
SHA-256 23b796e4e4bd3ed94e810107e3cb6485bee378b3f4f9156eb73a547fd53f6e9a
Apr 5, 2026 · 3.1 MB · Android API 28–34 · code 16
Imported from the F-Droid repository index.
- * Fix F-Droid build: regenerate launcher icon PNGs with correct sizes per density
- * Replace degenerate 48x48 placeholder PNGs that caused AAPT2 build failures
- * Icons now match the adaptive vector drawable design (purple + checkmark)
SHA-256 482466fae7438547073de7b970b2da323249078c802286f3f101067dd75e17d0
Will it run on your device?
55%
- Targets newer Android builds, so legacy devices may be excluded.
- ABI coverage is focused on newer 64-bit devices.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be com.callblocker is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 0.3.3 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Call Blocker first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Call Blocker, and a listing is removed when the evidence for it stops holding up.
Get Call Blocker
Every source we list for com.callblocker is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
23b796e4e4bd3ed94e810107e3cb6485bee378b3f4f9156eb73a547fd53f6e9a
Signing certificate
36e59e31e1752e3d881fbc5743a3d08a987c050cebc00636799b0cd5c5c6bf76
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.