Calc Engine

Calc Engine™ — The Calculator That Fits How You Work

A beautiful, fully customisable calculator that syncs across iPhone, iPad, Mac and Apple Watch.

Make it yours • Rich colour themes, fonts and key shapes • Design your own keyboard pages • Reorder each keyboard alongside the built-in pages

Your personal maths library • Define your own functions • Save constants • Full calculation history

Powerful maths, always within reach • Trig (radians or degrees), logarithms, exponentials, roots and more • Live results as you type • Per-function rounding for clean output

Hundreds of unit conversions • 250+ units across 40+ categories — length, mass, volume, temperature, time, energy, data and more • Tap a value and any two units to convert live • Favourite the categories you use most, synced across devices

Live graphing • Plot equations like x = y² or sin(x) • Tap any graph for a full-screen view • Dedicated graphing keyboard with x, y and =

Programmer mode • Hex (0x), binary (0b) and octal (0o) literals • AND, OR, XOR, NOT, shifts and rotates • HEX, DEC, OCT and BIN shown together

Private by design • Syncs through your personal iCloud — nothing stored on our servers • Fully localised and native on every Apple platform

Unlock Calc Engine+ for custom themes, fonts, key shapes, custom keyboards, user-defined functions, saved constants, unit conversions, live graphing, equation solving, programmer mode and more.

Teach it your formulas once. Use it forever.