# Winston Scientific Calculator — Offline math and graphing > Offline math and graphing (iPhone/iPad app by Robert Corbin.) - Source: https://appshunter.io/ios/app/winston-scientific-calculator/id6762801028 (this page in markdown: same URL + `.md`) - Developer: [Robert Corbin](https://appshunter.io/developer/1890247992) - Category: Utilities, Education - Price: $2.99 - Age rating: 4+ - Requires: iOS 17.0 · 4 MB - Released: 2026-04-21 - Data updated: 2026-08-19 - User reviews in markdown: https://appshunter.io/ios/app/winston-scientific-calculator/id6762801028/reviews.md ## What is Winston Scientific Calculator? 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. Calculator - 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. Result Audit - 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. Graphing and Function Lab - 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. Pro Tools - RPN stack calculator with Last X, swap, roll, and drop. - Programmer mode for hexadecimal, decimal, octal, binary, bitwise operations, shifts, rotates, word sizes, and two's-complement signed values. - Equation solver, exact fraction helper, complex number helper, statistics with linear regression, 17-category unit converter, CODATA 2022 constants library, and a searchable formula reference. Winston Scientific is intended for general calculation, education, and reference workflows. Finance, physics, and engineering formulas are educational references and are not professional advice. ## Version history (last 5 releases) ### 2.2 — 2026-08-17 Version 2.2 adds Matrix Lab — a full linear-algebra workbench, right on your phone. Matrix Lab Enter two matrices and compute add, subtract, multiply, transpose, determinant, inverse, RREF, rank, trace, integer powers, eigenvalues, and solve A·x = b — with unique, no-solution, and infinitely-many results all handled honestly. Show your work Determinant, inverse and RREF reveal every elementary row operation — swap, scale, eliminate — with the matrix redrawn after each step, so you follow the reduction, not just read the answer. Checked, not just computed Each inverse and solution is independently re-verified (A·A⁻¹ = I, A·x = b) and shows the residual, so you can trust the result. Eigenvalues Real and complex eigenvalues for any 2×2 or 3×3 matrix, plus symmetric matrices of any size, with real eigenvectors where they exist. Everything runs entirely on device — no account, no network, no tracking. ### 2.1 — 2026-06-30 Version 1.4 keeps Winston Scientific focused on the features that are actually in the app. - New DEG / RAD / GRAD angle modes (radians default), which corrects trig derivative, integral, and root results in Function Lab. - Greatly expanded function set (hyperbolics, factorial, exp, nth roots, modulo, gcd/lcm, nPr/nCr, reciprocal, percent, floor/ceil/round) plus implicit multiplication. - M+, M-, MR, MC memory keys and an Ans last-result variable. - New Unit Converter (17 categories, 140+ units) and a CODATA 2022 Constants library (45 constants). - New Statistics tool with one-variable summaries and linear regression. - Interactive grapher with pinch-zoom, pan, draggable trace, labeled gridlines, and an optional second curve. - Actionable history (tap to reuse, swipe to delete, clear all) and a new Settings screen. - The Formulas tab includes a searchable 68-formula library with 12 live solvers. - Metadata and screenshots were refreshed so the product page matches the shipped app experience. ### 2.0.1 — 2026-06-26 This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged. ### 2.0 — 2026-06-21 Winston Scientific 2.0 — a big pro upgrade, still 100% offline. • RPN mode: a full HP-style X / Y / Z / T stack with Last-X. • Programmer mode: live DEC / HEX / OCT / BIN with AND/OR/XOR/shifts and 8–64-bit word sizes. • Equation solver: roots of any f(x) = g(x), quadratics and cubics (real + complex), and 2×2 / 3×3 linear systems. • Fractions: exact a b/c arithmetic with auto-reduce and decimal-to-fraction conversion. • Complex numbers: rectangular and polar arithmetic. • Named A–Z registers (STO / RCL) you can use right inside your expressions. No account, no network — every calculation runs entirely on your device. ### 1.5 — 2026-06-20 A precision leap: the new calculus engine delivers accurate integrals (with error bounds), derivatives, roots, and inflection points, surfaced in the Lab and graph insights. Plus an audio-graph for the plot, full VoiceOver on the keypad, Dynamic Type, and a Share-able Lab report. ## More apps by Robert Corbin - [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266) - [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175) - [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447) - [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025) - [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719) - [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879) All apps by Robert Corbin: https://appshunter.io/developer/1890247992 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*