Calcpad Calculator (free)

Calcpad is a 12-digits real standard scientific calculator. It's careful design aims to improve user experience. It runs like a real standard calculator. The neat layout provides most commonly used functions of a standard scientific calculator:

- Dual displays
- Quick Tax/Discount calculation button
- Trigonometric functions : sin, cos, tan, sin^-1, cos^-1, tan^-1
- X², √, Xⁿ
- Common Logarithm (log), Natural Logarithm (ln), e^x, 10^x
- Factorial (n!), Combination (nCr), Permutation (nPr)
- MOD, %
- Constant PI, e
- Ten Memories (M+, M-, STO, RCL)
- Input and Result History
- Angle Unit (Radian / Degree)
- Normal / Scientific (SCI) / Fixed (FIX) display formats