# Two Links Double Pendulum vs CRT

The clearest difference is ads: Two Links Double Pendulum at none against CRT's shown. CRT's advantage is update cadence (daily vs every 47 months) and iOS requirement (15.0 vs 18.2). On price, 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, CRT daily. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Two Links Double Pendulum | CRT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 47 months | **Daily** |
| Size | 281 MB | 183 MB |
| Requires iOS | 18.2 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) | [Takatsugu Fukushima](https://appshunter.io/developer/838891625) |

## 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


### CRT

[App page](https://appshunter.io/ios/app/crt-nbreak/id6736833528)

**Features:** macOS Compatibility, Vision Pro support

**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 CRT free?

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

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

CRT shows ads; Two Links Double Pendulum does not.

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

Two Links Double Pendulum ships an update every 47 months, and CRT daily. Most recently, Two Links Double Pendulum was updated on October 9, 2026 and CRT on October 10, 2026.

---

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