超好用计算器

A simple, professional, and comprehensive calculator app. Our features include: 1. Professional calculations for stress-free arithmetic. Supports calculation step recording, touch screen vibration, and other auxiliary functions. 2. Provides various calculation functions, such as sine and cosine, for scientific calculations. 3. Supports binary and octal calculations for programmers. 4. Provides conversion functions for common units such as length, area, and energy, eliminating the anxiety of unfamiliar unit conversions. 5. Supports viewing calculation history for easy data verification.