Comparison

Fractal Catalog vs Strangely Attractive

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fractal Catalog

Features
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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

About

Strangely Attractive

Features
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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

Fractal Catalog4 screens
Strangely Attractive4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 3 level
Fractal Catalog versus Strangely Attractive: the parameters behind the verdict, then further details
ParameterFractal CatalogStrangely Attractive
Price$2.99Free — better
Update frequencyEvery 10 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17.0
Further details — not scored
Size4 MB12 MB
Age rating4+4+
DeveloperYasuyoshi OtaLanguageCraft

In-app purchases

None

Fractal Catalog

No in-app purchases

None

Strangely Attractive

No in-app purchases

Questions

Is Fractal Catalog free?
Fractal Catalog costs $2.99, with no in-app purchases.
Is Strangely Attractive free?
Strangely Attractive is free to download, with no in-app purchases.
Do Fractal Catalog or Strangely Attractive have ads?
Neither Fractal Catalog nor Strangely Attractive shows ads.
Which is updated more often, Fractal Catalog or Strangely Attractive?
Fractal Catalog ships an update every 10 months, and Strangely Attractive every 2 weeks. Most recently, Fractal Catalog was updated on November 3, 2026 and Strangely Attractive on November 5, 2026.

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