Call Blocker — Open Source SMS App

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