App Store's first calculator can customize the theme. Features: * Custom color themes to create your own personalized theme * 65536 colors, customize every detail * History add note function * Auto adjust height of the history list, no matter how long the calculation process can be displayed in full * History can be shared via e-mail * Easy, simple and quickly * Support Dark Mode Support Operation: • Basic operations (+, -, ×, ÷, %, Abs) • Backspace button • View and edit history calculations • Button sound is mutable Download now and see how truly great this calculator is.