Call Blocker is a productivity application designed for Android devices that automatically rejects unwanted calls, providing a seamless experience for users. With its lightweight design, it efficiently utilizes minimal memory and CPU resources, making it suitable for various devices without compromising performance. The app allows users to easily manage their call preferences by creating a blacklist and a whitelist.

Key features include the ability to add numbers to the blacklist to block unwanted calls and a whitelist for contacts that should always be reachable. Additionally, Call Blocker offers different blocking modes, including blocking all calls, blocking unknown numbers, and allowing only whitelisted contacts. Users can also keep track of rejected numbers through detailed log records, ensuring they remain informed about blocked interactions.