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All in One Calculator

Many calculators in one app

Three calculators and a unit converter, together in one app for iPhone and iPad: infix, RPN and programmer, with fractions, statistics and close to 500 units. Made for everyday sums and for the more complicated ones.

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All in One Calculator on iPhone, showing the standard calculator keypad and the tab bar for Calculator, Unit Converter, History and Information.

Three calculators, one app

Switch between infix, RPN and programmer without leaving the app. Expressions are written the way you would write them on paper, and you can go back and edit them.

Infix

The standard calculator, with statistical functions, fractions and memory. Every function is reachable in portrait, so there is no need to turn the device.

RPN

As many rows of the stack as you need, the expression that produced each result, drag and drop between rows, and buttons to manipulate the stack.

Programmer

Hexadecimal, octal and binary, individual bit manipulation, a full set of bitwise operators, and the matching ASCII and Unicode characters.

Programmer mode on iPad in landscape: the sidebar, a 64-bit binary display with bit indices, octal and hexadecimal bars, the decimal result, the matching ASCII and Unicode characters, and a keypad of bitwise operators.
Programmer mode on iPad, with the sidebar open.
RPN mode on iPad, showing the full T, Z, Y and X stack — 408, 9, 31,437 and 98,765 43,210 + 141,975 — beside the sidebar and the keypad.
The whole RPN stack, and the expression behind each result.

A unit converter that keeps up

Close to 500 units across 38 measurements, currency included. Search measurements and units to find what you need, then share a result or paste it back into the calculator to keep working.

The unit converter on iPhone, listing measurements from Acceleration to Electrical Resistance with a search field above them.
Search across 38 measurements.
The Area measurement on iPad, with all thirteen units filled at once: 7,275 Ares, 72.75 Hectares, 727,500 square meters, 179.76916502 Acre, 28,763.01254502 Marla and more.
Enter one value and every unit fills in at once.

History that remembers for you

A paper tape of what you have done. Results from both the calculator and the converter are kept here, and you can annotate entries so you remember what they were, search them, share them, or paste one back into the calculator. History can sync across your devices through your own iCloud account if you turn that on.

The history tape on iPhone, mixing unit conversions and calculator results, with a note reading Kitchen tiles against one entry.
Conversions and calculations in one tape, with your own notes.

Built for iPhone and iPad

Room to work

Sidebar and tab bar, several windows at once, windowed apps, Stage Manager and multitasking. Drag a sidebar entry or a calculator button to the edge of the screen to open a new window.

Fits your habits

Keyboard shortcuts, Scribble, Quick Notes, drag and drop, Spotlight, a widget of recent results, Home Screen quick actions, and App Intents for Shortcuts.

Yours to arrange

Mark favorites and hide what you never use, choose a button style, put the number pad on either side, and adjust precision with a slider or by pinching the result.

Accessible

VoiceOver and Voice Control throughout, any result spoken aloud, light and dark appearance, and detailed in-app help with its own table of contents and search.

Free, and without ads

The app is free and carries no advertising, and it asks you for nothing about yourself. Updates continue to add features.

View on the App Store