# King Crab: Math Challenge — Add, Subtract, Multiply & More

> Add, Subtract, Multiply & More (iPhone/iPad app by Jens Somers.)

- Source: https://appshunter.io/ios/app/king-crab-math-challenge/id6801548190 (this page in markdown: same URL + `.md`)
- Developer: [Jens Somers](https://appshunter.io/developer/1847195635)
- Category: Games, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 19 MB
- Languages: American English, Afrikaans, Albanian, Amharic, Arabic, Armenian, Assamese, Azerbaijani, Basque, Belarusian and 67 more
- Released: 2026-09-04
- Data updated: 2026-09-06
- User reviews in markdown: https://appshunter.io/ios/app/king-crab-math-challenge/id6801548190/reviews.md

## What is King Crab?

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.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| One-Time Premium Unlock | $3.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-09-04

No release notes.

## More apps by Jens Somers

- [Buzzkill](https://appshunter.io/ios/app/buzzkill/id6754295660)
- [Happy Five](https://appshunter.io/ios/app/happy-five/id6757990326)
- [Famous Chef](https://appshunter.io/ios/app/famous-chef/id6758932844)
- [Forget It](https://appshunter.io/ios/app/forget-it/id6788163617)
- [Jumping Fox: Learn Math](https://appshunter.io/ios/app/jumping-fox-learn-math/id6792367412)
- [Number Reef: Swim & Learn](https://appshunter.io/ios/app/number-reef-swim-and-learn/id6797616465)

All apps by Jens Somers: https://appshunter.io/developer/1847195635

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*