Comparison

Spooky the Ghost vs Two Links Double Pendulum

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Spooky the Ghost

Features
Read full description

This Halloween enjoy Spooky the Ghost. Spooky is a cute talking ghost! Just ask Spooky a question and press the ask me button, Spooky will speak random answer. Touch Spooky's eyes, nose and body to see what he says. Spooky is fun and entertaining for kids and adults of all ages. Happy Halloween! ** This app is intended for entertainment purposes only and does not provide true question answering functionality. ** ** Airplay requires an iOS device with AirPlay Mirroring, a wireless network, and a TV connected to an Apple TV ** _________________________________________________________ ** If you like this app, please write a review and also share this app with your friends, family and associates on Social Media. Thank you for your support. ** We work very hard to make our apps the best they can be and want our users to have a great user experience. If you have ideas on how to make this app better, or If you are experiencing technical problems with this app, please contact us by pressing the "App Support" button located in the Information screen. Thank you.

About

Two Links Double Pendulum

Features
Read 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

Screenshots

Spooky the Ghost4 screens
Two Links Double Pendulum3 screens

Verdict

The call

The clearest difference is price: Two Links Double Pendulum at Free against Spooky the Ghost's $0.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Two Links Double Pendulum is free to download; Spooky the Ghost costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Spooky the Ghost ships an update every 40 months, Two Links Double Pendulum every 47 months. The most recent releases landed on September 25, 2026 and October 9, 2026 respectively.

Scorecard1 real difference Ā· 5 level
Spooky the Ghost versus Two Links Double Pendulum: the parameters behind the verdict, then further details
ParameterSpooky the GhostTwo Links Double Pendulum
Price$0.99Free — better
Update frequencyEvery 40 months — betterEvery 47 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.0 — better18.2
Further details — not scored
Size42 MB281 MB
Age rating4+4+
DeveloperJS Digital Productions, Inc.Eliott Radcliffe

In-app purchases

None

Spooky the Ghost

No in-app purchases

None

Two Links Double Pendulum

No in-app purchases

Questions

Is Spooky the Ghost free?
Spooky the Ghost costs $0.99, with no in-app purchases.
Is Two Links Double Pendulum free?
Two Links Double Pendulum is free to download, with no in-app purchases.
Do Spooky the Ghost or Two Links Double Pendulum have ads?
Neither Spooky the Ghost nor Two Links Double Pendulum shows ads.
Which is updated more often, Spooky the Ghost or Two Links Double Pendulum?
Spooky the Ghost ships an update every 40 months, and Two Links Double Pendulum every 47 months. Most recently, Spooky the Ghost was updated on September 25, 2026 and Two Links Double Pendulum on October 9, 2026.

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