Callcalc: Smart Calculator for Android

Callcalc: Smart Calculator is a utility designed for Android users, facilitating quick calculations during phone calls. This app features a floating calculator that overlays the calling screen, allowing users to perform basic arithmetic tasks without interrupting their conversations. With options for automatic launch at the start or end of calls, it ensures seamless usability. The app also includes a history feature to keep track of past calculations, theme customization for personal preference, and operates offline, making it a practical tool for professionals who need to manage numbers on the go.

The user interface is designed to be accessible, featuring a movable and resizable window that does not obstruct essential call controls. The app supports addition, subtraction, multiplication, and division, catering to users who require straightforward calculations. It runs efficiently in the background with minimal system resource consumption, requiring Android 5.0 or higher. Awareness of the necessary permissions for overlay and call-state detection is essential for users to fully utilize the app's features.