Ech's Fractal vs Two Links Double Pendulum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ech's Fractal
Explore intricate fractal patterns with customizable depth and color palettes. This application allows users to render the Mandelbrot set with high detail.
- Customizable depth up to 5000
- Customizable colors
- Mandelbrot set rendering
- High detail exploration
Read full descriptionHide full description
Features - Customizable depth up to 5000 - Customizable colors
Two Links Double Pendulum
Read full descriptionHide full description
Two Links brings one of physics' most beautiful chaotic systems to life. Watch a double pendulum swing, twist, and spiral in real-time 3D — then place it on your floor in Augmented Reality and walk around it. Features • Real-time double pendulum physics (RK4 integration) • AR mode — anchor the pendulum on any flat surface • Orbit the 3D scene freely or let it run hands-free • Adjust link length, pivot position, density, and color • Particle trail from the second link tip • Night sky environment with the Moon and Earth • Pause, shuffle, and watch the chaos reset
Screenshots
Verdict
The clearest difference is update cadence: Ech's Fractal at every 18 months against Two Links Double Pendulum's every 47 months. Ech's Fractal also leads on iOS requirement (15.6 vs 18.2). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ech's Fractal ships an update every 18 months, Two Links Double Pendulum every 47 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | Ech's Fractal | Two Links Double Pendulum |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (6 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 18 months — better | Every 47 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.2 |
| Further details — not scored | ||
| Size | 36 MB | 281 MB |
| Age rating | 9+ | 4+ |
| Developer | Tuan Anh Nguyen | Eliott Radcliffe |
In-app purchases
Ech's Fractal
No in-app purchases
Two Links Double Pendulum
No in-app purchases
Questions
Is Ech's Fractal free?
Is Two Links Double Pendulum free?
Do Ech's Fractal or Two Links Double Pendulum have ads?
Which is updated more often, Ech's Fractal or Two Links Double Pendulum?
Other comparisons
