
$1.99
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About
My Functions is an interactive gallery of 200 mathematical functions, from the most elementary (the constant) to the most dizzying (Weierstrass, Cantor, Fresnel, 3D torus knots…).
Each card shows:
The mathematical formula
The family name (trigonometric, wavelets, neural activations, 3D curves, probability distributions…)
The name of the discoverer and their date, when known
A dynamic, interactive graph
INTERACT WITH THE CURVE
Adjust parameters (a, b, c, n…) with sliders: the graph updates in real time. Pinch to zoom, drag to pan, the Home button reframes. A log-Y toggle switches to logarithmic scale for distributions and exponentials.
DERIVATIVE, INTEGRAL, PROPERTIES
For explicit functions, three chips activate:
f'(x) — numerical derivative overlaid in green
∫ f — cumulative integral in orange
Properties — domain, range, parity, zeros, extrema and boundary limits, computed live
LISTEN TO FUNCTIONS
Every curve can be "sonified": its shape becomes a wavetable played at 220 Hz, and its FM and AM modulation follow the curve scanned across time. A mathematical chirp becomes an acoustic chirp, a gaussian becomes a bell, Cornu's spiral sings. Pin a second function and hear two simultaneous voices, separated by a perfect fifth, to compare curves by ear.
COMPARE, PIN, SHARE
Pin a function: its curve appears as a purple ghost on every other card. Export any card as a high-resolution PNG or a vector PDF — share via AirDrop, Photos, Files, Mail.
NAVIGATE
Text search (name, family, formula, discoverer)
Filter by family (30+ families)
Sort by complexity, alphabetical, or random
Favorites persisted between sessions
Table of Contents grouped by family
Jump directly by number (1 → 200)
Horizontal swipe, First / Last buttons
WHAT YOU WILL FIND
Polynomials, trigonometric, hyperbolic, exponentials, logarithms, wavelets (Ricker, Morlet, Kaiser), special functions (Gamma, Bessel, Airy, Riemann ζ, Fresnel, elliptic integrals), probability distributions (Gauss, Cauchy, Weibull, Pareto, Wigner, Rice, Nakagami, Kumaraswamy…), neural activations (ReLU, GELU, Mish, SELU, Snake), Fourier series, signal windows, physics (Planck, Bose-Einstein, Fermi-Dirac, Debye), geometric curves (cardioid, lemniscate, astroid, heart, Fay's butterfly), spirals (Fermat, Cornu, golden, hyperbolic), and 3D curves (trefoil knot, helices, torus, Viviani).
MADE FOR
Students — to breathe life into formulas
Teachers — a visual presentation tool
The curious — to rediscover the beauty of math
Developers and engineers — a quick reference
No ads, no account, no tracking. 100% offline. Universal for iPhone, iPad and Mac (with NavigationSplitView).
Enjoy the journey between the curves.
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What's New in MesFonctions
1.0
July 7, 2026



