GraphCalc 84: Graphing Calc
iOS Universel / Education
A full graphing calculator with the layout and feel of a classic handheld — built for iPhone and iPad. Plot up to 9 equations, run TI-style programs, solve systems, fit regressions. No ads, no subscriptions, no internet required.
NEW IN 1.3
• Math Snap — point your camera at a printed equation, get an editable expression.
• Scribble — write equations by hand or with Apple Pencil; recognized in real time.
• Unit-aware arithmetic — 5[m] · 9.81[m/s^2] just works, with one-tap conversion.
GRAPHING
• Function, parametric, polar, and sequence modes
• 9 simultaneous equations, color-coded
• ZOOM (in/out, decimal, square, standard, trig, fit), TRACE with touch-jump
• CALC: zeros, min/max, intersect, dy/dx, ∫f(x)dx
• Spiffy Graph mode — neon glow with adjustable intensity
MATH
• Trigonometry, logarithms, complex numbers (rectangular & polar)
• Matrices [A]–[J] with full linear-algebra ops
• Statistics: 1-Var, 2-Var, ten regression types including SinReg
• Distributions: Normal, t, χ², F, Binomial, Poisson, Geometric
• Probability: nPr, nCr, factorial, randInt, randNorm, randBin
APPS
• TVM Solver, Loan Calculator, Tip Split
• Equation Solver, Quadratic, Polynomial Roots, Systems
• Numerical derivative, definite integral, Riemann Explorer
• Periodic Table, Physics Constants, Coordinate / Unit Converter
• Curve Fitting, Combinatorics, Dice Probability
• Date Calculator, Vector Calculator, Step-by-Step Solver, Graph Inequalities
PROGRAMMING
• BASIC-style language with If/Then/Else, While, For, Repeat
• Draw, Line, Circle, Shade, Text, StorePic / RecallPic
• Programs persist across launches
PERSONAL
• 12 themes including amber phosphor, green phosphor, midnight, paper, porcelain, sunset — all WCAG-AA contrast certified
• External display support on iPad
• Hardware keyboard support
• Imports custom .gctheme.json files
WHY GRAPHCALC 84
• Buy once. Free updates. No ads. No subscriptions.
• Every calculation runs on-device. No account, no telemetry.
• Built by a developer who actually uses graphing calculators.
Quoi de neuf dans la dernière version ?
Bug fixes in STAT and MATRIX functions.