Calculator HD - Professional app analytics for December 21

This is a professional, simple, and practical calculator that supports retro voice reporting and voice reporting with the click of a button. We focus on making the most practical calculator. Product features: 1. Support for retro voice broadcasting, one click to open and close voice broadcasting 2. Theme color settings, buttons, text, and background colors can be switched freely in multiple styles 3. Background image settings, providing options for rich background images 4. Randomly match theme images and colors to flexibly set the theme 5. Saving real-time historical records of calculation results 6. Support bracket operations 7. Support deletion and recall when entering an error