# Two Links Double Pendulum vs altDQ

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.

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.

## The numbers

| Metric | Two Links Double Pendulum | altDQ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/altdq/id6738352231/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Weekly** |
| Monetization | — | Free |
| Size | 281 MB | 445 MB |
| Requires iOS | 18.2 | **17.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) | [Isovist Limited (UK)](https://appshunter.io/developer/1779057941) |

## What reviewers say

### Two Links Double Pendulum

[App page](https://appshunter.io/ios/app/two-links-double-pendulum/id1625794656)

**Features:** macOS Compatibility

**In-app purchases:** none


### altDQ

[App page](https://appshunter.io/ios/app/altdq/id6738352231)

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.

**Highlights:** 3D space exploration, Tap to reveal code and hypertext, View artwork from both sides, See dimensional photos, Behind-the-scenes stories, Interactive elements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Two Links Double Pendulum free?

Two Links Double Pendulum is free to download, with no in-app purchases.

### Is altDQ free?

altDQ is free to download, with no in-app purchases.

### Do Two Links Double Pendulum or altDQ have ads?

Neither Two Links Double Pendulum nor altDQ shows ads.

### Which is updated more often, Two Links Double Pendulum or altDQ?

Two Links Double Pendulum ships an update every 47 months, and altDQ weekly. Most recently, Two Links Double Pendulum was updated on September 16, 2026 and altDQ on June 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*