Kazuasobi Math Drill
Daily timed arithmetic
Free · Designed for iPad. Not verified for macOS.
Units unlock by grade, so children never meet a problem they have not been taught. Includes the 180-card homework deck.
A daily arithmetic practice app for elementary school children.
It covers the full elementary curriculum from grade 1 to grade 6 as timed drills, and records your best time and best score for every course.
■ Units unlock by grade
47 units, from counting in grade 1 to ratios in grade 6. Only the units up to the grade you choose will appear, so children never get stuck on something they have not been taught yet.
■ Built for the calculation cards used as homework
90 addition cards from 1+1 to 10+9, plus the 90 subtraction cards that mirror them. Work through the same deck used at school while the timer runs.
■ Problems adapt to the child
The app looks at how quickly a question is answered, not only whether it was right, and picks problems at a difficulty that fits. Not so easy that it gets boring, not so hard that the child stops.
■ Word problems start with building the equation
Read the sentence, choose the equation, then calculate. Change a setting and the child writes the equation themselves. The answer needs a unit too, so units never get forgotten.
■ Mental arithmetic read aloud (soroban style)
Questions are read out loud and answered from memory.
■ Hints show how to think, not the answer
Number lines and diagrams show the approach. A hint never simply gives the result.
■ Mistakes come back later
Missed questions are remembered and shown again after a gap, when they are just about to be forgotten.
■ Units included
Grade 1 counting, addition, subtraction, carrying, borrowing
Grade 2 two-digit arithmetic, times tables, units of length and weight, telling time
Grade 3 division, remainders, long multiplication, large numbers, fractions, decimals
Grade 4 rounding, decimal multiplication and division, like fractions, order of operations, area, angles
Grade 5 multiples and factors, LCM and GCD, primes, unlike fractions, averages, percentages, speed, volume
Grade 6 fraction multiplication and division, ratios, area of a circle, letters in equations
Advanced positive and negative numbers, prime factorisation, classic Japanese word problems
No ads. All records stay on the device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
First release.
- 47 units covering grades 1 to 6
- Homework calculation cards (90 addition + 90 subtraction)
- Problem difficulty adapts to the child
- Word problems, read-aloud mental arithmetic, and mistake review
The developer, nakagawa kenta, 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
- nakagawa kenta
- Size
- 17 MB
- Category
- Education
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - iPad
Requires iPadOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Kenta Nakagawa