Fractal Catalog vs Strangely Attractive
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fractal Catalog
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In the “Fractal Catalog” iPhone/iPad app, you can see various fractal figures while moving them. ** Fractals handled in “Fractal Catalog” ** C Curve Sierpinski Gasket Sierpinski Carpet Pentaflake Hexaflake Sierpinski Curve Hilbert Curve Peano Curve Moore Curve Koch Curve Koch Snow Flake Gumowski Mira Attractor Julia Set Mandelbrot Set Cellular Automaton Pascal’s Triangle Barnsley Fern Dragon Curve Modified Koch Curve Tree Curve Z Order Curve Minkowski Sausage Vicsek Snow Flake Saltire Vicsek Snow Flake Cross Torn Square Fractal Cantor Set Cantor Dust Gosper Curve Gosper Curve N13 Affine Transformation IFS Ammonite Affine Transformation IFS Tree Affine Transformation IFS Twin Dragon Affine Transformation IFS Branch Affine Transformation IFS Fern 2 Chaos Game Random Walk & Levy Flight Diffusion Limited Aggregation Diffusion Limited Deposition Invasion Percolation Ballistic Aggregation Devil’s Staircase Eden Model Scheidagger River Net
Strangely Attractive
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Strangely Attractive turns the equations of chaos into something you can watch. Six classic strange attractors — Lorenz, Rössler, Aizawa, Thomas, Halvorsen, and Chen — each drawn live as a single glowing trajectory that never quite repeats. A handful of simple rules, tracing an endlessly intricate shape. • See it in 3D. Orbit the attractor in a real phase space, or flip to a clean 2D canvas. • Read the math. The exact differential equations behind each system, set beautifully on screen. • Learn by doing. Guided lessons walk through sensitive dependence — the butterfly effect — the Lyapunov exponent, and how Euler and RK4 integration drift apart. • Tune it. Adjust each system's parameters and watch the shape transform. • Home Screen widgets. Pin a favorite attractor where you'll see it. No account, no tracking, no network. Just the strange beauty of deterministic chaos. Made by Luke Steuber.
Screenshots
Verdict
The clearest difference is price: Strangely Attractive at Free against Fractal Catalog's $2.99. Strangely Attractive also leads on update cadence (every 2 weeks vs every 10 months). Fractal Catalog's advantage is iOS requirement (15.6 vs 17.0). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Strangely Attractive is free to download; Fractal Catalog costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Fractal Catalog ships an update every 10 months, Strangely Attractive every 2 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Fractal Catalog | Strangely Attractive |
|---|---|---|
| Price | $2.99 | Free — better |
| Update frequency | Every 10 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 4 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | LanguageCraft |
In-app purchases
Fractal Catalog
No in-app purchases
Strangely Attractive
No in-app purchases
Questions
Is Fractal Catalog free?
Is Strangely Attractive free?
Do Fractal Catalog or Strangely Attractive have ads?
Which is updated more often, Fractal Catalog or Strangely Attractive?
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