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Call Blocker

Block unwanted calls, spam and telemarketing
New in version 0.3.4
Maintenance release.
- Validates F-Droid automatic update flow via Tags.
- No behavior changes for end users.
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
  • app screenshot
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Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

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  • Version 0.3.4 (17) suggested Added on Apr 15, 2026

    This version requires Android 9.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • show notifications
      Allows the app to show notifications
    • read call log
      This app can read your call history.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • read phone numbers
      Allows the app to access the phone numbers of the device.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • com.callblocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3 MiB PGP Signature | Build Log

    • New in version 0.3.3
    * 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)
  • Version 0.3.3 (16) - Added on Apr 05, 2026

    This version requires Android 9.0 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • answer phone calls
      Allows the app to answer an incoming phone call.
    • directly call phone numbers
      Allows the app to call phone numbers without your intervention. This may result in unexpected charges or calls. Note that this doesn't allow the app to call emergency numbers. Malicious apps may cost you money by making calls without your confirmation.
    • run foreground service
      Allows the app to make use of foreground services.
    • run foreground service with the type "specialUse"
      Allows the app to make use of foreground services with the type "specialUse"
    • show notifications
      Allows the app to show notifications
    • read call log
      This app can read your call history.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone. Apps will also have access to the accounts on your phone that have created contacts. This may include accounts created by apps you have installed. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • read phone numbers
      Allows the app to access the phone numbers of the device.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • run at startup
      Allows the app to have itself started as soon as the system has finished booting. This can make it take longer to start the phone and allow the app to slow down the overall phone by always running.
    • com.callblocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

    Download APK 3 MiB PGP Signature | Build Log

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