Spam Call/SMS/Notification blocker
About this app
It blocks unwanted calls, SMS messages, and app notifications without replacing your default call/SMS app.
Notification Screening applies your blocking rules to RCS, Signal, WhatsApp, email, and any other messaging app that posts a notification, not just your default SMS app, so spam gets filtered no matter which app it arrives through. Alerts give you a lightweight sound/vibration/flashlight/screen-wake chime for allowed screened notifications, instead of a duplicate full notification.
Filters:
1. Regex rule for number & SMS content. 2. Contact 3. STIR attestation 4. Repeated call 5. Dialed number 6. Recently used apps 7. Time schedule 8. Notification Screening (title/body of chosen apps' notifications)
Details: https://github.com/KerballOne/SpamBlocker-Extended
Licensed under MIT, by KerballOne.
What's New in v6.1.1
Imported from the F-Droid repository index.
- SpamBlocker Extended 6.1.1
- New:
- - Rule Testing now supports testing Notification-type rules, with translations for all locales.
- Fixes:
- - Fixed the Play Store/F-Droid listing icon still showing the original upstream icon instead of this fork's icon (a leftover asset outside the app's build path, not visible in the app itself).
Version history
Jul 14, 2026 · 8 MB · Android API 29–36 · code 611
Imported from the F-Droid repository index.
- SpamBlocker Extended 6.1.1
- New:
- - Rule Testing now supports testing Notification-type rules, with translations for all locales.
- Fixes:
- - Fixed the Play Store/F-Droid listing icon still showing the original upstream icon instead of this fork's icon (a leftover asset outside the app's build path, not visible in the app itself).
SHA-256 4f948214378e1019efe078777ecec1bf7559743cac1093ad7d5b3a760ff476fb
Jul 12, 2026 · 8 MB · Android API 29–36 · code 610
Imported from the F-Droid repository index.
- SpamBlocker Extended 6.1
- New:
- - Voicemail Notification: pull the caller's number out of a voicemail-app notification and block it by Non-Contact or Database, the same way a call would be blocked. Optionally also check it against your Number/Text Rules, and optionally allow it if the number had a recent, non-blocked call in your own Calls log.
- Improvements:
- - Voicemail Notification now also honors an allowed Contact, same as a real call.
- - Notification Screening's dedup cache now clears a notif
SHA-256 130ef01dd52704519b2f2672c8004a1a82871144b2893f68f3f7174190e75f1b
Jul 10, 2026 · 7.9 MB · Android API 29–36 · code 600
Imported from the F-Droid repository index.
- SpamBlocker Extended 6.0
- New:
- - Notification Screening: apply your blocking rules to notifications from RCS, Signal, WhatsApp, email, and any other messaging app, not just your default SMS app.
- - Alerts: a lightweight sound/vibration/flashlight/screen-wake chime for allowed screened notifications, configurable per-app or per-rule, instead of a duplicate full notification.
- - New adaptive app icon and app name (SpamBlocker Extended).
- Improvements:
SHA-256 77151fe1e5d04ce15e3584b3795a85fc143985a9312fa60829b7171cbad2c65e
Will it run on your device?
74%
- Targets newer Android builds, so legacy devices may be excluded.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
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 dev.kerballone.spamblocker 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, 6.1 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall SpamBlocker Extended (Call/SMS/Notification) 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 SpamBlocker Extended (Call/SMS/Notification), and a listing is removed when the evidence for it stops holding up.
Get SpamBlocker Extended (Call/SMS/Notification)
Every source we list for dev.kerballone.spamblocker 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
4f948214378e1019efe078777ecec1bf7559743cac1093ad7d5b3a760ff476fb
Signing certificate
47ccf88ffc2985edae38965edf770a338d858fa5d1ae8b80ddf720f744e48cf3
Permissions Required
What each permission lets SpamBlocker Extended (Call/SMS/Notification) do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
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.
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