Calc Ninja - Mental Math Duel

Slash demons with arithmetic

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Fill the blanks in each equation to build the answer and defeat demons in this mental-math puzzle! 30 scrolls, 6 ranks, ramping up gently. Brain training for adults. Calc Ninja is a mental-math battle puzzle. Fill the blanks in each equation to strike down the oni! How to play 1. Each battle shows an equation with blank tiles, e.g. ( □ + □ ) × □ = 18. 2. Tap number tiles to fill the blanks so the equation is true. 3. A correct answer strikes the demon; a wrong answer or running out of time lets it strike you. Content - 30 scrolls across 6 ninja ranks (Shoden to Gokui) - 16 unique oni bosses with a demon gallery - Operators and parentheses stay fixed. You only place the numbers, so it is pure mental math. Great for - Adults who want daily brain training - Anyone who likes number puzzles and quick arithmetic - Fans of a Japanese ninja-and-oni theme Free to play. No account required. * This app is a work of fiction. Characters and story are not based on real people or events.

Ratings & Reviews

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- Added English, Korean, and Traditional Chinese. Enjoy Calc Ninja in your device's language. - Polished the title screen. Thanks for playing! We'd love to hear your feedback in a review.

Version 1.0.1

The developer, kotaro yamada, 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:

    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • kotaro yamada
Size
  • 123.8 MB
Category
  • Puzzle
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
  • Mac
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 2.0 or later.
Languages
English and 3 more
  • English, Japanese, Korean, Traditional Chinese
Age Rating
9+
  • 9+
  • Learn More
  • Infrequent
    Cartoon or Fantasy Violence

    Contains
    Advertising
Copyright
  • © KotaroYamada
  • Developer Website
  • Privacy Policy

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