• iPhoneアプリ情報&サポート

A calculation puzzle that fills hidden numbers with hints of visible numbers.


  • The multiplication and division formulas will be displayed, so fill in all the hidden numbers using the visible numbers as hints.
  • Each square contains a single number.
  • The leftmost square never be zero.
  • In multiplication, the rightmost zero is not contained in calc process.

Feature of tools

Enter numbers

  • After selecting the block by touching it, enter it with the number buttons.
Delete numbers

  • Delete the number of the selected block with the delete button.
Delete multiple numbers at once

  • Use the delete all button to delete all entered numbers.
  • You can choose to delete all or delete all but the protection block.
Memo ON / OFF

  • When the memo function is turned on, you can write down numbers in the block.
  • Each time you touch the memo button, it switches between ON and OFF.
  • While the memo function is ON, the delete operation is also performed on the memo.
Protect entered numbers

  • Protects entered numbers from being deleted.
  • You can choose whether to keep the protection block when deleting all at once.
Undo input

  • Undo entering or deleting numbers.
  • However, all deleting at once cannot be canceled.

  • Redo the undone operation.
Create & select question

  • Create a new question or select a previously created question.
  • Questions are created each time by the app program.
  • Since a large amount of memory is consumed when creating a question, a time limit is set to prevent a crash due to insufficient memory.
  • If time expires, please retry or change the settings such as reducing the number of digits.
Sound effect ON / OFF

  • Turns sound effects on and off.
Manual shown / hidden

  • Toggles between showing and hiding the manual.

Privacy Policy

  • This application is a free application created by Satoshi Horiguchi.
  • In this application, we will never request, collect, sell or sell personal information such as name, address, email address, credit card number, social security number etc. to third parties.
    In addition, we do not acquire, use, transfer and sell to the third party, photographs, contact addresses included in the device, data in another application etc.
  • This application does not connect to the Web. Therefore, it does not use cookie information stored in the device.
  • However, in advertisements displayed in this application, we use a third party service that collects information used to identify you. Please confirm the privacy policy of the third party service provider used by the application from the following link.
  • I may update our privacy policy from time to time. Therefore, we recommend that you periodically review the changes on this page. I will inform you of the change by posting a new privacy policy on this page. These changes will take effect immediately after posting on this page.
  • If you have any questions or suggestions regarding this privacy policy, please contact us from the above e-mail link.