SpamBlocker (Call & SMS)

Spam Call/SMS blocker

New in version 5.6

Improvements
- "Dialed Number" now supports "Forever", more intuitive than 999999999 days
- SMS notifications now show all lines, previously truncated to 2 lines
- reverse top bar text color according to the current theme to prevent "white text on white bg"
- Long tap the tile icon to launch this app instead of opening the app info page
- show error prompt when an "API Query" json is mis-imported to the section "Workflows"
- backup file chooser remembers last dir

It blocks unwanted calls & SMS messages without replacing your default call/SMS app.

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

Details: https://github.com/aj3423/SpamBlocker

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.

Download F-Droid

Version 5.6 (506) suggested Added on Apr 09, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 10 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- view network connections
  
  Allows the app to view information about network connections such as which networks exist and are connected.
- answer phone calls
  
  Allows the app to answer an incoming phone call.
- run foreground service
  
  Allows the app to make use of foreground services.
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_EXTERNAL_STORAGE
- android.permission.PACKAGE_USAGE_STATS
- show notifications
  
  Allows the app to show notifications
- Read calendar events and details
  
  This app can read all calendar events stored on your phone and share or save your calendar data.
- 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 the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- android.permission.READ_LOGS
- 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.
- read your text messages (SMS or MMS)
  
  This app can read all SMS (text) messages stored on your phone.
- 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.
- receive text messages (MMS)
  
  Allows the app to receive and process MMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- receive text messages (SMS)
  
  Allows the app to receive and process SMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- ask to ignore battery optimizations
  
  Allows an app to ask for permission to ignore battery optimizations for that app.
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- modify system settings
  
  Allows the app to modify the system's settings data. Malicious apps may corrupt your system's configuration.
- spam.blocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 7.4 MiB PGP Signature | Build Log

New in version 5.5

Fix:
- Groq API preset blocks all texts

Changes:
- Light theme removed, all colors tunable (for color blindness)

Enhancements:
- History records
- Full screening log
- Show a yellow "!" if anything went wrong, e.g. Api query timed out
- A "Test" button in context menu

Version 5.5 (505) - Added on Mar 01, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 10 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- view network connections
  
  Allows the app to view information about network connections such as which networks exist and are connected.
- answer phone calls
  
  Allows the app to answer an incoming phone call.
- run foreground service
  
  Allows the app to make use of foreground services.
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_EXTERNAL_STORAGE
- android.permission.PACKAGE_USAGE_STATS
- show notifications
  
  Allows the app to show notifications
- Read calendar events and details
  
  This app can read all calendar events stored on your phone and share or save your calendar data.
- 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 the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- android.permission.READ_LOGS
- 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.
- read your text messages (SMS or MMS)
  
  This app can read all SMS (text) messages stored on your phone.
- 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.
- receive text messages (MMS)
  
  Allows the app to receive and process MMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- receive text messages (SMS)
  
  Allows the app to receive and process SMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- ask to ignore battery optimizations
  
  Allows an app to ask for permission to ignore battery optimizations for that app.
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- modify system settings
  
  Allows the app to modify the system's settings data. Malicious apps may corrupt your system's configuration.
- spam.blocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 7.4 MiB PGP Signature | Build Log

New in version 5.4

Fix:
- "Contacts(Strict)" allows contact numbers at priority 0, should be 10.
UI and logic simplified
- Crash when creating huge backups (500k+ db numbers)

Enhancements:
- History records
- Time Color
Show times in different colors, making it easier to review recent records.
e.g. red for <5min, blue for today's number
- Highlight keywords in the SMS content that caused the block
- Auto mark-all-as-read on tab leave
- Added "FAQ" (next to "About")

Version 5.4 (504) - Added on Feb 18, 2026

arm64-v8a armeabi-v7a x86 x86_64

This version requires Android 10 or newer.

It is built and signed by the original developer, and guaranteed to correspond to this source tarball.
Permissions
- view network connections
  
  Allows the app to view information about network connections such as which networks exist and are connected.
- answer phone calls
  
  Allows the app to answer an incoming phone call.
- run foreground service
  
  Allows the app to make use of foreground services.
- have full network access
  
  Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
- android.permission.MANAGE_EXTERNAL_STORAGE
- android.permission.PACKAGE_USAGE_STATS
- show notifications
  
  Allows the app to show notifications
- Read calendar events and details
  
  This app can read all calendar events stored on your phone and share or save your calendar data.
- 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 the contents of your shared storage
  
  Allows the app to read the contents of your shared storage.
- android.permission.READ_LOGS
- 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.
- read your text messages (SMS or MMS)
  
  This app can read all SMS (text) messages stored on your phone.
- 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.
- receive text messages (MMS)
  
  Allows the app to receive and process MMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- receive text messages (SMS)
  
  Allows the app to receive and process SMS messages. This means the app could monitor or delete messages sent to your device without showing them to you.
- ask to ignore battery optimizations
  
  Allows an app to ask for permission to ignore battery optimizations for that app.
- prevent phone from sleeping
  
  Allows the app to prevent the phone from going to sleep.
- modify or delete the contents of your shared storage
  
  Allows the app to write the contents of your shared storage.
- modify system settings
  
  Allows the app to modify the system's settings data. Malicious apps may corrupt your system's configuration.
- spam.blocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Download APK 7.4 MiB PGP Signature | Build Log

Versions

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