GraphCalc84

iPhone / Utilitaires

GraphCalc 84 is a powerful graphing calculator for iPhone and iPad that combines the familiar layout and functionality of a classic handheld graphing calculator with modern touch gestures and a beautiful color display.

Whether you're a student tackling algebra and calculus, a teacher demonstrating concepts in class, or a professional who needs a reliable scientific calculator on the go, GraphCalc 84 delivers the full feature set you expect — no bulky hardware required.

GRAPHING

Plot up to 9 color-coded equations simultaneously
Function, Parametric, Polar, and Sequence graphing modes
Pinch-to-zoom and finger-drag panning for intuitive exploration
Trace mode with coordinate readout — double-tap to activate
Preset zoom levels: Standard, Decimal, Trig, Square, and Zoom Fit
Customizable window settings (Xmin, Xmax, Ymin, Ymax, scale)
Auto-generated value tables with adjustable start and step size
SCIENTIFIC CALCULATOR

Trigonometric, inverse trig, and hyperbolic functions
Logarithms (natural, base-10, and arbitrary base)
Powers, roots, square root, cube root, and nth root
Absolute value, rounding, integer/fractional parts, GCD, LCM
Permutations, combinations, and factorials
Random number generation (uniform, normal, binomial)
Radian, Degree, and Gradian angle modes
Normal, Scientific, and Engineering display notation
COMPLEX NUMBERS

Full complex arithmetic in rectangular (a+bi) and polar (re^θi) forms
Conjugate, magnitude, angle, real/imaginary extraction
Seamless rectangular-to-polar conversion
STATISTICS & REGRESSION

1-Variable and 2-Variable statistics
Eight regression models: Linear, Quadratic, Cubic, Quartic, Logarithmic, Exponential, Power, and Sinusoidal
Hypothesis testing: Z-Test, T-Test, χ²-Test, F-Test, ANOVA, and more
Probability distributions: Normal, Student-t, Chi-Square, F, Binomial, Poisson, and Geometric (PDF, CDF, and Inverse)
Distribution shading visualization
CALCULUS

Numerical derivatives (symmetric difference quotient)
Numerical integration (Gaussian quadrature)
Summation (Σ) notation
Function minimum and maximum finder
BUILT-IN APPS

TVM Solver and Loan Calculator for finance
Equation Solver, Quadratic Formula, Systems of Equations
Polynomial Root Finder
Unit Converter and Coordinate Converter
Physics Constants reference and Periodic Table
Vector Calculator, Date Calculator, and more
PROGRAMMING

Built-in BASIC-style programming language
Create, edit, and run custom programs
Program storage between sessions
ADDITIONAL FEATURES

Matrix operations and storage
Number base conversions (Decimal, Binary, Octal, Hex)
Expression history with scrollback
Persistent storage for variables, equations, and programs
Familiar key layout with 2nd and ALPHA modifier keys
Dark theme optimized for comfortable use
GraphCalc 84 is built entirely in SwiftUI for a fast, native iOS experience. No internet connection required — every calculation runs on-device.