KIGAKU - How Machines Work
See how mechanisms move
Free · Designed for iPad. Not verified for macOS.
All-new design, plus two new modes: planetary gears and the Geneva drive. Move 12 mechanisms with your finger, from gears to a robot arm. Now in 74 languages.
KIGAKU is a visual learning app that teaches how machines work by letting you move them.
How do teeth change speed and torque? Why can a pulley or screw turn a small force into a large one? Move a slider and the mechanism responds at once, with its results updating alongside. The formulas in your textbook connect to motion you can see.
[Transmit power]
- Gears: how tooth counts set speed and torque
- Belt drive: pulley diameter and speed ratio
- Planetary gear (new): hold a different part for reduction, overdrive, or reverse
[Multiply force]
- Pulleys: rope count, required force, and pull distance
- Lever: fulcrum position and balance of moments
- Screw: turning torque into thrust, and efficiency
- Hydraulics: Pascal's principle and piston area ratio
[Convert motion]
- Linkage: four-bar paths and Grashof's condition
- Cam: shapes that turn rotation into lift
- Crank: converting rotation and reciprocation
- Geneva drive (new): turning steady spin into stop-and-go steps
- Robot arm: joint angles and tip position
[Features]
- A sheet explaining the formulas and principles of each mechanism
- Learn without an internet connection
- Dark and light modes
- Available in 74 languages
- Free, with banner ads only at the bottom of the screen
Great for students of mechanical engineering and robotics, anyone curious about how machines work, and teachers looking for classroom material.
Developer: Fuji Bit Inc.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
3.0.0
- All-new design
- New modes: planetary gear and Geneva drive
- Now available in 74 languages
- New ad system, with ad settings added
The developer, Fuji Bit Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
- Other Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Fuji Bit Inc.
- Size
- 26.9 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 72 more
- English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Azerbaijani, Basque, Belarusian, Bengali, Bulgarian, Burmese, Cambodian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Filipino, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Japanese, Kannada, Kazakh, Korean, Kyrgyz, Laotian, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Mongolian, Nepali, Norwegian Bokmål, Oriya, Persian, Polish, Portuguese, Punjabi, Rhaeto-Romance, Romanian, Russian, Serbian, Simplified Chinese, Singhalese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese, Zulu
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Fuji Bit Inc.