HappyCode Lab

Latest Release

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  歴史タイムライン - 日本史と世界史を年表で俯瞰

  Education

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iPad & iPhone

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  歴史タイムライン - 日本史と世界史を年表で俯瞰

  Education

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  ClockLesson - Learn by touch

  Understand the time display

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  SwapNumbers - Math puzzle

  Uses addition and subtraction.

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  CrowWalking

  Find a route to get the gems.

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  CalculatorDU - for daily use

  Useful calculator

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