Supported Features
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Dark Interface
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Differentiate Without Color Alone
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Reduced Motion
Chalk & Sum: Math Puzzle
Relaxing Number Brain Teaser
Only for iPhone
Free · Designed for iPhone
iPhone
A calm number puzzle on a chalkboard. Rearrange the numbers, drop in the operators, and make the sum. New every day: a daily puzzle with a gentle streak.
Rearrange the numbers. Drop in ( + − × ÷ ). Make the sum.
Chalk & Sum is a calm math puzzle drawn in chalk. No timers, no lives, no rush — just you, a blackboard, and a number to reach.
HOW IT WORKS
Each puzzle gives you a target and a row of numbers. Swap them around, place operators between them, add brackets if you need them, and press Submit. Easy to learn, surprisingly deep — and many levels hide more than one answer.
WHAT'S INSIDE
• 60 handmade levels across six chapters, from first sums to real brain teasers
• Every Way Counts: find every answer to a level for bonus coins
• Relax mode: endless gentle puzzles that never run out
• A daily puzzle with a forgiving streak — miss a day, keep your streak
• Collect chalk doodles for your board and arrange them your way
• Gentle hints when you're stuck, in three steps so you never lose the "aha"
• Opens like a book on iPhone Duo: the target on one page, play on the other
• Game Center achievements and iCloud sync across your devices
MADE TO BE CALM
Soft chalk sounds, a quiet soundtrack, and a board that never rushes you. Great for a coffee break, a commute, or winding down before bed. Good for keeping your mental math sharp at any age.
FAIR AND SIMPLE
Free to play, with occasional ads between levels and never in the middle of a puzzle. Remove ads with one purchase, forever. No account needed.
If you enjoy number games like 24 or Make 10, or daily puzzles like Digits, you'll feel right at home.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Kartik Kaushik, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- Kartik Kaushik
- Size
- 6.9 MB
- Category
- Puzzle
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 Kartik Kaushik
