Two instruments, one idea

A calculator and a graphing calculator you own.

For iPhone, iPad and Mac. Each is paid for once and works entirely offline — no subscriptions, ads, accounts or tracking — and a result can be sent from one to the other.

The calculator you used at school, done properly.

A dedicated instrument that opens instantly and treats your mathematics with respect — real keys, a two-line display you can edit, and an answer you can carry forward.

Fractions stay exact until you ask for a decimal
Six named variables and 15 CODATA physics constants
Home Screen widgets, and a one-minute guided tour

See Ans — the scientific calculator → iPhone · iPad · Mac

See the area under the curve.

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

Roots, intersections, extrema and the gradient at a point
Four curves at once, told apart without relying on colour
A value table you can step through and export

See Ans Graph — the graphing calculator → Coming soon

They work together

Send a result across.

Find an integral or a root in Ans Graph and send it to the calculator, where it arrives on the input line ready to carry on with. Nothing is worked out on arrival and nothing changes until you press a key — the value simply sits there, as though you had typed it.

See both used on one problem — worked examples → Free · every sum shown

∫₀¹ 1/(1+x²) dx ≈ 0.7853981634

Ans × 4 = 3.141592654

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 Each one states its equation, its assumptions and when to stop trusting it. Unit converters Exact factors, sensible rounding and the working shown.