Mental Math Kingdom
Level up: grade 1 to adult
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
■ No ads. One-time purchase. No sign-up needed.
A mental math trainer you can hand to your kids with confidence. Your learning records stay on your device, and no account is needed.
■ Your journey on the Math Road
From grade-1 addition to times tables, 2-digit multiplication, and adult-level challenges — climb Levels 1 to 20, collecting stars one step at a time.
- Pick your grade, or take a 1-minute placement test to find your starting point
- Always start where you can win, and level up without frustration
- Grade 1 (addition), Grade 2 (times tables), Grade 3 (division), Grade 4+ (2-digit multiplication), plus brain training for teens and adults. The whole family can use it.
■ Master mental multiplication
Doing "23 x 47" in your head is a real skill — and the top of the Math Road is where you earn it.
- Step-by-Step: break 2-digit multiplication into 3 steps and learn how it works
- Times-Table Ladder: unlock stage by stage and collect stars
- Weak-Spot AI: analyzes your mistakes and targets what you struggle with
■ Gamification that keeps you coming back
- Earn XP and rank up from "Rookie" all the way to "Mental Math King"
- Daily streaks, combos, and a badge collection
- Daily Challenge: the same 10 questions for everyone, every day
- Game Center leaderboards (daily / all-time / time attack / weekly league)
■ Modes for every mood
Practice / Step-by-Step / Daily Challenge / Time Attack / Survival / Review / Weak-Spot AI
■ See your growth
Accuracy and speed trend charts, per-topic stats, and a parent report. Progress you can see keeps motivation high.
■ Mental Math Kingdom Pro (one-time purchase — buy once, use forever)
Unlocks Survival, Weak-Spot Review, unlimited Time Attack, detailed stat charts, and all themes. It is not a subscription.
For ages 6 to adult — kids, students, and grown-ups keeping their minds sharp.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bug fix
The developer, Hiroki Sekimoto, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hiroki Sekimoto
- Size
- 13.7 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Mental Math Kingdom Pro $3.99
- Copyright
- © 2026 Hiroki Sekimoto
