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 CallScreeningServ