CalcPro: Simple Calculator

Arindam Banerjee

In-app purchases

About this app

CalcPro — Release Notes

Core Calculator

- Full arithmetic: addition, subtraction, multiplication, division
- Percentage and modulo operator
- Smart parentheses — auto-balances open/close brackets
- Live result preview updates as you type
- Radians / Degrees toggle
- AC (clear all) and DEL (backspace)

Scientific Calculator

- Trigonometry: sin, cos, tan
- Inverse trig: asin, acos, atan (via INV toggle)
- Natural log (ln) and Common log base 10 (log)
- Square root √, power xʸ, x², 10ˣ, eˣ
- Factorial x! and Absolute value |x|
- Constants: π and Euler's e
- Variable X for use with the graph

Function Grapher

- Real-time graph of up to 5 simultaneous functions
- Auto-scaling Y axis with smart grid lines
- Enable / disable individual functions
- Add and remove function slots

Memory Buttons (optional, toggle in Settings)

- MR — recall, M+ — add, M− — subtract, MC — clear

Calculation History

- Stores up to 200 past calculations
- Tap any entry to reload it into the calculator
- Delete individual entries or clear all history

Custom Constants & Functions (Fx panel)

- Save up to 6 custom constants (c, d, f, g, h, j)
- Save up to 4 custom functions of x: a(x), b(x), k(x), l(x)
- Edit or delete saved entries at any time

Unit Converter

- Length — m, km, cm, mm, mi, yd, ft, in
- Weight — kg, g, lb, oz, t, st
- Temperature — °C, °F, K
- Area — m², km², mi², ft², ac, ha
- Volume — L, mL, gal, fl oz, cup, m³
- Speed — m/s, km/h, mph, knot
- Time — s, min, h, day, week, month, year
- Data — B, KB, MB, GB, TB, bit

Settings

- Theme: System default, Light, Dark
- Keep screen on
- Restore display content on startup
- Memory buttons (show/hide)
- Vibration with intensity control (Light / Moderate / Strong)
- Angle mode (Radians / Degrees) — persists across sessions

All Features Free

- Every feature is unlocked for all users at no cost
- Optional developer support subscription available in Settings

Download CalcPro today and make calculations effortless!

What’s new

Core Calculator (Full arithmetic: addition, subtraction, multiplication, division )
Scientific Calculator
Function Grapher (Real-time graph of up to 5 simultaneous functions)
Memory Buttons
Calculation History
Custom Constants & Functions (Fx panel)
Unit Converter

All Features Free

- Every feature is unlocked for all users at no cost
- Optional developer support subscription available in Settings