Call Blocker

Call Blocker

Block unwanted calls, spam and telemarketing

redv6.com Phone & SMS

Download (3.1 MB)

Screenshots

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Description

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

What’s new (0.3.6)

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

Versions

Version Date Size Requires Android Download
0.3.6 current
841694626cf06986…
 2026-10-12 3.1 MB API 28
0.3.4
23b796e4e4bd3ed9…
 2026-04-15 3.1 MB API 28
0.3.3
482466fae7438547…
 2026-04-05 3.1 MB API 28

Permissions

What the app asks the system for. Android only grants sensitive access after you confirm it.

  • Phone stateDetect ongoing calls and read device information.
  • READ_CALL_LOG
  • ANSWER_PHONE_CALLS
  • Read contactsAccess the address book.
  • NotificationsShow notifications.
  • Run at startupStart automatically after the device is switched on.
  • Foreground serviceKeep running in the background, visible in the status bar.
  • FOREGROUND_SERVICE_SPECIAL_USE
Show 3 more permissions
  • Place callsCall phone numbers without asking again.
  • READ_PHONE_NUMBERS
  • callblocker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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