Expression Calculator Standard

This easy to use calculator displays expression results in decimal, hexadecimal, octal and binary formats quickly.
Users can enter numbers in decimal, hexadecimal and binary format without switching modes.
Binary can be shown in both big endian and little endian.
Support +,-,×,÷, AND, OR, XOR, left shift, right shift and MOD operations.
Support 8/16/32/64-bit integer and unsigned integer as well as float and double.
Previously entered expressions are stored and can be reused (up to 40).
6 themes available.
Sound effect to distinguish between successful calculation and errors.
Vibration effect can be turned on and off.