Captain Calculus
A pirate maths adventure
$2.99
Solve a little. Bring home a fortune. Explore four maths worlds, choose your difficulty and earn treasure for your ship and secret cave. No ads or in-app purchases.
Solve a little. Bring home a fortune.
Captain Calculus turns arithmetic practice into a pirate adventure. Choose addition, subtraction, multiplication or division, then pick one of five difficulty islands. Sail an endless trail of levels through four illustrated worlds, with ten problems in each level.
Harder difficulty islands earn more gold. First-try answers earn 10, 25, 50, 75 or 100 gold, with 100 to 1,000 gold for a perfect ten-problem level. A mistake costs only that problem’s reward: retries never take more gold, and every new problem offers a fresh reward at the selected difficulty. Free hints help you work it out at your own pace.
Earned chests collect aboard your ship. Visit the treasure hold, then return to your cave and watch the coins, diamonds and coloured gems spill out through real physics. Your gold stays safe in the cave, with large fortunes stored in labelled gold-bar reserves.
• Addition, subtraction, multiplication and division
• Five difficulties for each operator
• Endless levels with ten problems each
• Free visual hints and unhurried practice
• Treasure that you earn, carry home and explore
• Touch controls for iPhone and iPad
• Offline play and progress saved on your device
• No advertisements, accounts or in-app purchases
Your next island is waiting, Captain.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Coins still tumble from each chest, then settle into solid piles that support the next delivery.
This update fixes floating gold piles, improves cave loading, and keeps treasure inspection controls clear in portrait and landscape. Your saved gold and progress are preserved.
The developer, Anders Hafreager, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Anders Hafreager
- Size
- 31 MB
- Category
- Family
- Compatibility
Requires iOS 18.3 or later.
- iPhone
Requires iOS 18.3 or later. - iPad
Requires iPadOS 18.3 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Infrequent
Guns or Other Weapons
- Copyright
- © 2026 Anders Hafreager
