King Crab: Math Challenge

Add, Subtract, Multiply & More

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Protect the King Crab! Chase away wrong answers with sand, build a 5-answer streak for golden crabs and double points, collect shells, and unlock new characters. Learn maths while protecting the king of the beach. In every round, four little crabs approach the King Crab, each carrying a possible answer. Your job is to chase away every crab with a wrong answer before they reach him. But be careful. Throw sand at a crab with the correct answer and you lose a full life. PROTECT THE KING CRAB Each question brings four crabs with possible answers. Tap the crabs with wrong answers to throw sand at them and scare them away. Let a wrong-answer crab reach the King Crab and you lose half a life. Accidentally hit a crab with the correct answer and you lose a full life. Look carefully, choose wisely, and act before they get too close. BUILD A GOLDEN STREAK Answer five questions correctly in a row to activate a special bonus. From then on, the crabs turn golden, move faster, and are worth double points. Keep playing without mistakes to continue your golden streak. Make one wrong move and the bonus ends. CATCH THE HELPER CRABS Special helper crabs sometimes appear carrying extra lives. Tap them quickly before they disappear. Depending on the helper crab, you can recover half a life or a full life. CHOOSE WHAT YOU WANT TO PRACTISE Pick the type of maths you want to train: • addition • subtraction • multiplication • division • percentages • mixed questions Choose a level that suits you and increase the difficulty as your skills improve. COLLECT SHELLS Earn shells while you play and build up your score. Use your collected shells to unlock new characters and expand your collection. PRACTISE AT YOUR OWN LEVEL Start with simple calculations or choose harder levels when you want a bigger challenge. You decide what to practise and how difficult the questions should be. FOR DIFFERENT AGES AND ABILITIES • Ages 5–8: practise addition and subtraction • Ages 9–11: improve times tables and multiplication • Ages 12+: work on division, percentages, and mixed questions From careful thinking to fast reactions during a golden streak, King Crab makes maths practice active, playful, and challenging. THINK, DEFEND, AND SCORE Chase away the wrong answers, protect the correct crab, collect shells, grab extra lives, and keep your golden streak going for as long as possible. The longer you stay accurate, the faster the crabs become and the higher your score can climb.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Added additional promotional videos showcasing different levels and characters, improved overall performance, and refined the design for iPad and right-to-left languages.

Version 1.1

The developer, Jens Somers, 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
    Jens Somers
    Size
    18.9 MB
    Category
    Games
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and 76 more
    • English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Assamese, Azerbaijani, Basque, Belarusian, Bengali, Bosnian, Bulgarian, Burmese, Cambodian, Catalan, Croatian, Czech, Danish, Dutch, Estonian, Faeroese, Finnish, French, Galician, Georgian, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Irish, Italian, Japanese, Kannada, Kazakh, Korean, Laotian, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Marathi, Mongolian, Nepali, Norwegian Bokmål, Oriya, Persian, Polish, Portuguese, Punjabi, Romanian, Russian, Serbian, Simplified Chinese, Singhalese, Slovak, Slovenian, Spanish, Swahili, Swedish, Tamil, Telugu, Thai, Tibetan, Turkish, Uighur, Ukrainian, Urdu, Uzbek, Vietnamese, Welsh, Zulu
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Hakketjak
  • Developer Website
  • Privacy Policy

    • More by Jens Somers