Two Links Double Pendulum vs altDQ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
altDQ
Explore a seminal 1986 digital art piece in an immersive 3D space. Interact with the artwork to reveal hidden code, hypertext, and behind-the-scenes stories about its creation.
- 3D space exploration
- Tap to reveal code and hypertext
- View artwork from both sides
- See dimensional photos
- Behind-the-scenes stories
- Interactive elements
Read full descriptionHide full description
April Greiman's Does it Make Sense?, created in 1986 for Design Quarterly is on display at LACMA's Digital Witness exhibit. The work explored the use of Apple's Macintosh computer to assemble a collage of illustrative assets and words -- delivered on paper, Z space implied. Now this work can be viewed in X | Y | Z space using a smartphone or tablet. Here are features to explore: tap the screen to reveal related code and hypertext tap again to turn them off see inside photos that have become dimensional witness this display on both sides of the artwork video and images on the back side present stories of the process of making of the original work
Screenshots
Verdict
The clearest difference is update cadence: altDQ at weekly against Two Links Double Pendulum's every 47 months. 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.
Two Links Double Pendulum ships an update every 47 months, altDQ weekly. The most recent releases landed on September 16, 2026 and June 11, 2026 respectively.
| Parameter | Two Links Double Pendulum | altDQ |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 47 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 18.2 | 17.0 — better |
| Further details — not scored | ||
| Size | 281 MB | 445 MB |
| Age rating | 4+ | 12+ |
| Developer | Eliott Radcliffe | Isovist Limited (UK) |
In-app purchases
Two Links Double Pendulum
No in-app purchases
altDQ
No in-app purchases
