Ans
Ans Graph Graph

Graphing calculator for iPhone, iPad and Mac

See the area. Drag the bounds. Trust the answer.

Ans Graph puts numerical integration where it belongs: the shaded region on the graph and the value beside it. Move either bound and both respond together.

  • Paid once
  • No subscription
  • Fully offline
f(x) = sin(x)Integral
The area under sine from zero to pi A sine curve with the region above the x-axis shaded between draggable bounds at zero and pi. a b 0π
≈ 2 estimated error below display precision
Paid onceiPhone, iPad and Mac
No subscriptionsNo recurring charge
No adsNo interruptions
No trackingWorks fully offline

And on the Mac

A desktop instrument.

A resizable window with the function rail beside the plot, a menu command for everything and a keyboard shortcut for most of it. Four functions at once, each with its own colour, line pattern and token, so they stay four things rather than a tangle.

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

Ans Graph on a Mac: four functions plotted at once — 3 times sine x, x squared over 8 minus 5, 4 times cosine x and x over 2 — each in its own colour and line pattern
Four curves at once, and you can still read them.

The real app

Hold it on iPhone.
Spread out on iPad.

The same instrument on both: the shaded area and its value in one hand, and every function listed beside the plot on the larger screen.

Ans Graph on iPhone: sine shaded from zero to pi, the integral reading approximately 2 with an estimated error below 1E−9 in the register beneath the plot
iPhoneThe area, the bounds and the answer in one hand.
Ans Graph on a 13-inch iPad: four functions listed in the rail on the left, each in its own colour, beside a full-height plot
iPadEvery function in the rail, beside a full-height plot.

Read the curve

The graph answers back.

A plotted line is the start, not the result. Ans Graph gives the important points a value, a place and an honest statement of what was found.

Roots and intersections

Find the candidates in the current view, step between them and see each coordinate on the graph.

Gradients

Choose a point and read the local slope with its tangent, so the number stays attached to the shape.

Trace and value table

Move along a curve for live coordinates, or compare functions at exact x-values in a table you can export.

Constants in the language

Fifteen CODATA 2022 physical constants are tokens in the expression language, not numbers you look up and paste. h is the Planck constant everywhere an expression can go, each one carrying its unit and an Exact, Derived or Measured badge — so E = h × f plots where it actually lives, at 10⁻³³.

Readable without colour

Every curve carries its own line pattern and token as well as its colour, so four functions on one graph stay four things when colour cannot carry them.

Take it with you

Export the plot as an image or a PDF, or the value table as CSV, straight to the files and apps you already use — from the device itself.

Deliberately focused

Fewer features. Each one excellent.

Ans Graph is not trying to win a feature-count contest. It concentrates on plotting, exploring and the analysis you need to trust, with numerical approximation treated as a result to explain rather than hide.

The shade, the handles, the value and its uncertainty are one idea — kept together on purpose.

One universal purchase

Your graphs, on the screen in front of you.

One purchase covers iPhone, iPad and Mac. Each layout is native to its screen, from a graph you can hold to a full desktop instrument.

  • iPhone
  • iPad
  • Mac

See it working

Three problems, worked all the way through.

The worked examples take a real question each — the distance a car covers while drag builds, what £10,000 becomes in twenty years, where a mortgage payment goes — and show the formula, the keystrokes and the plot, with every figure checked.

Owned, not rented

The maths stays here.

Ans Graph works fully offline. There are no accounts, adverts, analytics, trackers or third-party dependencies. Saved graphs stay on your device, and the widget reads only a small local file in the app's own private container. Nothing is sent anywhere. Read the privacy promise.