# Two Links Double Pendulum vs Pi Answer Game

The clearest difference is in-app purchases: Two Links Double Pendulum at none against Pi Answer Game's 1. Two Links Double Pendulum also leads on ads (none vs shown). Pi Answer Game's advantage is update cadence (weekly vs every 47 months) and iOS requirement (12.0 vs 18.2). On price and device support there is nothing between them.

Both are free to download. Pi Answer Game sells 1 one-off in-app purchase. Two Links Double Pendulum asks for nothing beyond the download.

Two Links Double Pendulum ships an update every 47 months, Pi Answer Game weekly. Both last shipped on October 9, 2026.

## The numbers

| Metric | Two Links Double Pendulum | Pi Answer Game |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pi-answer-game-digits-game/id1665926116/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 47 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 281 MB | 45 MB |
| Requires iOS | 18.2 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eliott Radcliffe](https://appshunter.io/developer/1477487767) | [Hokushi Hara](https://appshunter.io/developer/1501828113) |

## 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


### Pi Answer Game

[App page](https://appshunter.io/ios/app/pi-answer-game-digits-game/id1665926116)

Test your memory of pi digits with this engaging game. Choose from timed or untimed modes, practice specific digit sequences, and compete globally to become a pi master. Fill in missing digits to train your recall.

**Highlights:** Timed and untimed modes, Practice mode for specific digits, Global leaderboards, Fill-in-the-gap gameplay, Dark mode support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


## Frequently asked questions

### Is Two Links Double Pendulum free?

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

### Is Pi Answer Game free?

Pi Answer Game is free to download, with in-app purchases available.

### Do Two Links Double Pendulum or Pi Answer Game have ads?

Pi Answer Game shows ads; Two Links Double Pendulum does not.

### Which is updated more often, Two Links Double Pendulum or Pi Answer Game?

Two Links Double Pendulum ships an update every 47 months, and Pi Answer Game weekly. Most recently, Two Links Double Pendulum was updated on October 9, 2026 and Pi Answer Game on October 9, 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.*