Two Links Double Pendulum vs Pi Answer Game
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Two Links Double Pendulum
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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
Pi Answer Game
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.
- Timed and untimed modes
- Practice mode for specific digits
- Global leaderboards
- Fill-in-the-gap gameplay
- Dark mode support
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Pi Answer Game is a fun and addictive pi game. There is a no time limit mode and a 30 second time limit mode to test your pi memory. There is also a practice mode where you can jump to a specified number of digits and memorize them. Compete with players from around the world to become a pi master! Fill in the gaps by answering pi and train your memory! Dark mode supported.
Screenshots
Verdict
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.
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. 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.
| Parameter | Two Links Double Pendulum | Pi Answer Game |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 47 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 18.2 | 12.0 — better |
| Further details — not scored | ||
| Size | 281 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Eliott Radcliffe | Hokushi Hara |
In-app purchases
Two Links Double Pendulum
No in-app purchases
Pi Answer Game
- Remove ads$1.99
Questions
Is Two Links Double Pendulum free?
Is Pi Answer Game free?
Do Two Links Double Pendulum or Pi Answer Game have ads?
Which is updated more often, Two Links Double Pendulum or Pi Answer Game?
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