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KOURAKU — Navigation

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Fuji Bit Inc. · Education
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App info

Developer
Fuji Bit Inc.
Category
Education
Released
Oct 11, 2026
Version
1.0 (Oct 12, 2026)
Price
Free
Size
25.8 MB
Requires
iOS 15.0
Age rating
4+
Languages
English, French, German, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese

In-app purchases

none
Current prices, App Store US.

About KOURAKU — Navigation

KOURAKU is a visual education app about how people cross the sea and work out where they are — the science of navigation and positioning — learned by watching and interacting. Follow the story from classical celestial navigation to modern GPS through simulations and hands-on challenges. As the navigation module of the "Raku" series, KOURAKU sits next to KAIRAKU (oceanography). If KAIRAKU is the science of tides and currents, KOURAKU is the craft of using them to cross the ocean. It covers six topics from high-school earth science and physics up to introductory navigation. [Explore and Challenge — a learning cycle] Every mode can be used in two ways: - Explore: move the sliders freely and see the principle at work. - Challenge: solve a task with the answer hidden. Read the instrument to measure, work out your position, then check your answer. When you get it right, the app shows the…
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