A simple calculator app for Android built with Kotlin and View Binding. It supports basic arithmetic operations, including addition, subtraction, multiplication, division, modulus, and toggling positive/negative numbers. The app also preserves the calculator state across device rotations.

• Basic arithmetic operations: +, -, *, /, %
• Plus/Minus toggle for numbers
• Decimal support
• Clear (AC) and Backspace functionality
• Shows previous calculation
• Preserves state on screen rotation
• Material-inspired design with edge-to-edge support

calculator