Caller ID - Who Called Me is an Android application designed to identify and block unwanted and spam calls, functioning as a comprehensive caller identification tool. The app displays the true caller's name and details during incoming calls, allowing users to make informed decisions about whether to answer. It effectively identifies unknown and private callers, as well as spam, scam, and telemarketing calls, enhancing the user's call management experience.

In addition to its caller identification features, the app serves as a default SMS and messaging application, enabling users to manage text messages efficiently. It offers functionalities such as SMS blocking for spam and unwanted messages, a T9 dialer for easy call-making, and detailed call history with true caller names. Users can also blacklist unwanted numbers for call and SMS blocking, ensuring that they maintain control over their communications.