Added App Store listings in more languages. No changes to the app itself.

A clearer App Store name and search details. No other changes in this update.

Compare Models Evaluate two expressions at the same inputs and inspect their sampled difference with an explicit angle convention. 1. Open Tools and choose Compare models. 2. Enter A(x), B(x), an increasing range, sample count and angle mode. 3. Compare the rows, inspect undefined results, save the latest worksheet or share the comparison. Supports 2–101 sample points and expressions up to 500 characters. Samples do not prove equality or exact intersections between points. Ans, memory and unspecified registers are not imported; use explicit constants for reproducibility. One worksheet is retained locally.

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.

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.

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.

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.

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.

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.

Version 1.3 is a major upgrade. New DEG/RAD/GRAD angle modes (radians default) that correct trig derivative, integral, and root results in Function Lab. Greatly expanded functions (hyperbolics, factorial, exp, nth roots, modulo, gcd/lcm, nPr/nCr, reciprocal, percent, floor/ceil/round) plus implicit multiplication. M+/M-/MR/MC memory and an Ans variable. New Unit Converter (17 categories, 140+ units) and a CODATA-2022 Constants library (45 constants). New Statistics tool (one-variable summaries + linear regression). Interactive grapher with pinch-zoom, pan, draggable trace, gridlines, and an optional second curve. Actionable history (tap to reuse, swipe to delete) and a Settings screen. The Study tab is now a searchable 68-formula library with 12 live solvers. Fully offline — no account, no ads, no tracking, no subscription.

Function Lab adds pro-grade analysis for equations in x: derivative estimate, definite integral estimate, min/max scan, root detection, sample table, graph handoff, and a copyable lab report.

Updated app icon and refreshed the native calculator experience.