Calculator

Scientific calculator for iPhone, iPad and Mac

A proper scientific calculator. Yours.

Designed by a scientist for people who work with numbers. Ans is fast, focused and deliberately simple—without giving up the mathematics that matters. A one-minute Quick Tour shows you the real calculator in action.

Get Ans on the App Store See Ans in action

£4.99 once
No subscriptions
No ads

Exact fraction ⅓ × 3 = 1

Exact pi sin(π) = 0

Works offline

£4.99 onceOne purchase

No subscriptionsNo recurring charge

No adsNo interruptions

No trackingYour work stays local

The real calculator

Clear on iPhone.
Focused on iPad.

The same structured expression, exact result and familiar controls on both devices—without shrinking a desktop interface onto a touch screen.

Ans on iPhone calculating sine squared of 30 degrees plus cosine squared of 30 degrees, with the exact result 1 — **iPhone**The complete scientific face, always ready.

Ans on a 13-inch iPad evaluating open bracket A plus B close bracket times open bracket A minus B close bracket, with the exact fraction seventeen over one hundred and forty-four — **iPad**A centred instrument with room to think.

Now on Mac

A real desk calculator.

A compact window that can keep itself in front while you write in the document behind it. Type calculations straight from the keyboard—Return for equals—hold Shift while clicking for a key's second function, and open all six variables and 15 built-in physics constants in a window of their own.

Included in the same purchase: buy Ans once and it is yours on iPhone, iPad and Mac.

Ans on a Mac, pinned in front of a thesis page and a notes window, computing the transmitted fraction that the page describes — Keep in Front, over the work it is for.

Made for serious thinking

Simple where it should be.
Capable where it counts.

Ans feels like a dedicated instrument: clear controls, an expression you can edit, and results that respect the way you entered the problem.

Fractions stay fractions

Exact arithmetic remains exact. Switch to a decimal only when you want one.

Built around your answer

Reuse results naturally, continue with an operator, or revisit and edit earlier expressions.

Variables without clutter

Store six reusable values, give them names, or choose from 15 built-in 2022 CODATA physics constants.

See it work

A one-minute Quick Tour presses and holds the real keys to demonstrate modes, variables, physics constants and exact results, on iPhone and iPad.

A complete scientific tool

Trigonometry, logarithms, powers, roots, scientific notation, memory and precise display modes.

Yours to keep

One purchase, with no subscriptions, accounts, adverts or app tracking—and no connection required.

New in version 1.3

See it work.
Then put constants to work.

A one-minute Quick Tour runs on the calculator itself, pressing the real keys as you watch—and every variable can be set from a built-in library of physics constants, so the numbers you reach for most are already there. Both work offline, like everything else in Ans.

The Quick Tour running on Ans: SHIFT is lit, a hand rests on the square-root key, and the display shows the cube root of 8 with the result 2 — **Quick Tour**Offered once, and in Settings whenever you want it. iPhone and iPad.

The physics constants list in Ans, showing the speed of light, gravitational constant, standard gravity and Planck constant with their values, units and whether each is exact or measured — **15 physics constants**2022 CODATA values, with the units and whether each is exact or measured.

Answers at a glance

Your calculation history,
right on the Home Screen.

Small, medium and large widgets share Ans’s calculator styling. Use the arrow keys to move through recent work, then open the selected calculation in the full app.

The ownership promise

A calculator should be a tool, not a service.

Buy Ans once and the whole calculator is yours. There is no account, recurring payment, advertising business model or deliberately limited free tier.

No subscriptions: Not now. Not later.
No advertising: No banners, placements or interruptions.
No account: Open it and calculate.
No tracking: Your work stays on your device.

Honest ownership

£4.99. Once.

The complete scientific calculator. No locked functions and no recurring charge.

Get Ans on the App Store Ans: Scientific Calculator Requires iOS or iPadOS 17 or later, or macOS 13 or later. One purchase covers every device you own.

Also from Ans — coming soon

A graphing calculator with the same promises. Plot up to four functions, find roots, intersections and gradients, and integrate with the region shaded on the graph and the value beside it — move either bound and both respond together.

Paid once for iPhone, iPad and Mac. No subscription, no ads, no tracking, and fully offline — saved graphs stay on your device and nothing is sent anywhere.

See what Ans Graph does →

Ans Graph on a Mac: four functions plotted at once, each with its own colour and line pattern, with the function rail beside the plot — Four curves at once, and you can still read them.

Also from Ans

Free tools, ready in your browser.

A stopwatch, world clock, 36 focused science calculators and 138 unit converters — all free, with no ads, tracking or account.

Stopwatch & timer Millisecond precision that survives background tabs and a closed lid. World clock Exact GMT/UTC with stated accuracy; UK time labelled correctly by season. Science calculators 36 focused instruments for maths, physics, optics, chemistry and computing. Unit converters 138 focused pages with named systems, static tables and exactness in view.

See it working

Three problems, worked all the way through.

The worked examples show the calculator doing real work — compound interest on a £10,000 lump sum, the monthly payment on a £200,000 mortgage, the distance under a speed–time curve — with every keystroke listed, variables used properly, and each answer checked a second way.

Made for people who work with numbers.

Questions, feedback or an especially awkward calculation?

Talk to the developer