Offline math and graphing

Winston Scientific Calculator

Offline math and graphing

Winston Scientific Calculator is a local-first calculator, graphing, and formula-reference app for iPhone and iPad. Everything runs on your device with no account requirement, no advertising SDK, no analytics SDK, and no tracking.

iPhone & iPadNo accountNo ads or trackingPrivate by design

Features

What it does

Solve scientific expressions with full order of operations and implicit multiplication, including inputs like 2pi and 3(4).
Switch DEG / RAD / GRAD angle modes from the main calculation surfaces. Radians is the default for calculus and physics workflows.
Use trig, inverse trig, hyperbolic functions, factorial, exp, powers, roots, logarithms, modulo, gcd/lcm, permutations, combinations, reciprocal, percent, floor, ceil, round, and more.
Keep M+, M-, MR, MC memory keys, an Ans last-result variable, and A-Z stored registers close at hand.
Reuse calculation history with tap-to-reload, swipe-to-delete, and clear-all controls.
Recheck the current expression with an independent parser pass.
Review a verification score, residual, finite-result status, angle-mode context, and domain-sensitive warnings.
Convert a result into decimal, scientific, rounded, and fraction forms where appropriate.
Copy a concise audit report when you need to share the reasoning behind a result.
Plot f(x) with pinch-to-zoom, drag-to-pan, labeled gridlines, a draggable trace readout, and an optional second curve g(x).
Estimate derivatives, second derivatives, definite integrals with error bounds, roots, extrema, inflection points, and sample tables.
Copy a clean lab report from the Function Lab.

Calculator

Result Audit

Graphing and Function Lab

Pro Tools

Privacy

Private by design

Winston Scientific Calculator does not require an account and does not include third-party advertising or analytics SDKs. Content you create stays in the app on your device unless you explicitly export or share it. See the privacy policy.