# Two Links Double Pendulum — Double Pendulum Simulation

> Double Pendulum Simulation (iPhone/iPad app by Eliott Radcliffe.)

- Source: https://appshunter.io/ios/app/two-links-double-pendulum/id1625794656 (this page in markdown: same URL + `.md`)
- Developer: [Eliott Radcliffe](https://appshunter.io/developer/1477487767)
- Category: Entertainment, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 18.2 · 281 MB
- Languages: English
- Released: 2022-07-17
- Data updated: 2026-05-30
- User reviews in markdown: https://appshunter.io/ios/app/two-links-double-pendulum/id1625794656/reviews.md

## What is Two Links Double Pendulum?

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


## Version history (last 2 releases)

### 2.0 — 2026-05-21

A complete rewrite in Kotlin Multiplatform, adds Augmented Reality, and delivers a fully redesigned interface.

What’s New
Augmented Reality — place the double pendulum in your real environment using RealityKit. Drag to reposition, pinch to scale, and rotate with two fingers.
3D planet models — a high-resolution Earth and Moon appear in the scene, loading with a smooth fade-in transition.
Night sky environment — an HDR skybox sets the scene against a starlit background in standard view.
Shuffle — randomize link lengths, offsets, and colors with a single tap.
Refined controls — a redesigned top bar with menus for view mode, link colors, and dimensions.
Particle emitters — track the location of the tip of the second pendulum link

### 1.0 — 2022-07-17

No release notes.

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## More apps by Eliott Radcliffe

- [dRuBbLe](https://appshunter.io/ios/app/drubble/id1477487768)
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- [ER3D Euler Rotations in 3D](https://appshunter.io/ios/app/er3d-euler-rotations-in-3d/id6741169432)

All apps by Eliott Radcliffe: https://appshunter.io/developer/1477487767

## Related topics

[eliott radcliffe](https://appshunter.io/ios/topics/eliott-radcliffe)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-30.*