ReverseChange

Entertainment

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

A practical training application dedicated to enhancing mental arithmetic and reaction skills. By simulating real-life cash return scenarios, you need to quickly calculate the amount that should be returned to the customer and select the correct answer to advance to the next challenge. The application offers multiple difficulty levels: from simple integer cash returns to those with decimals and high interference challenges, helping you train your attention, calculation speed and accuracy in a fun game. Unique Features: Multiple difficulty levels: beginner, intermediate, advanced, and challenge mode, gradually enhancing your mental calculation skills. Time-limited questions: Each question is limited to 5 seconds, aiming to enhance quick decision-making skills. Retrying Incorrect Answers: If you answer incorrectly or exceed the time limit, you can immediately retry to help reinforce your memory. Sharing and Ranking: You can share your scores with friends and enjoy the fun of the competition. Operation is simple: Just click "Start" to begin the training, and the operation is straightforward and intuitive.

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The developer, Suwandi Dong, 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 Not Collected

    The developer does not collect any data from this app.

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    Accessibility

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    Information

    Seller
    • Suwandi Dong
    Size
    • 5.3 MB
    Category
    • Entertainment
    Compatibility
    Requires iOS 13.0 or later.
    • iPhone
      Requires iOS 13.0 or later.
    • iPod touch
      Requires iOS 13.0 or later.
    • Mac
      Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 Suwandi
  • Privacy Policy