Doomsday calculator memory

Test your hability to dates

Free · Designed for iPad

In 1970, British mathematician John Conway devised a way to quickly calculate the weekday of any given date without the help of calculators, computers, or calendars. This app helps you to practice and memorize.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

Now you can control speech voices speed on English, Portuguese, German, Italy and Chinese.

Version 2.3

The developer, Joao Vianna, 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.

    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
      • Joao Vianna
    • Size
      • 3.7 MB
    • Category
      • Education
    • Compatibility
      Requires iOS 17.6 or later.
      • iPhone
        Requires iOS 17.6 or later.
      • iPad
        Requires iPadOS 17.6 or later.
      • Mac
        Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.3 or later.
    • Languages
      • English
    • Age Rating
      4+
    • Copyright
      • © Joao Vianna
  • Privacy Policy

    • More by Joao Vianna

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