Comparison

Math Ninja AR vs KING OF MATH

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Math Ninja AR

This app uses augmented reality to make learning math engaging for children. By combining physical movement with interactive math problems in a 3D world, it aims to improve concentration and memory retention of sums.

Highlights
  • Augmented reality math learning
  • Physical activity for memory stimulation
  • Interactive 3D Ninja World exploration
  • Collectible cards
  • No in-app purchases
Features
Read full description

Ranked in the top 10 apps for 6 to 8 year olds in 109 countries! Stimulate your body & brain and memorize sums you’ll never forget! Boost Your Concentration and Memory with Body & Brain Activity! Ever wonder why you still know how to ride a bicycle despite everything else you have forgotten? “Math Ninja AR” was developed with the use of the latest AR technology, based on the concept that simultaneous stimulation to both your body and brain is the key to developing a long-term memory. Our goal is to provide experiences and sums, kids will never forget. Find the Villager with the Correct Answer! Explore every nook and cranny of the 3D Ninja World to find the villager with the correct answer to the math question. Physical movements of stretching, bending, squatting, crawling, reaching and peering will stimulate a child’s memory whilst providing a parent an opportunity for easy exercise. New Stage “Ninja Tower” Added and No More In-App Purchase! Together with the addition of a new ninja stage, we decided to remove in-app purchase in the hope that more and more kids are able to enjoy the world of Math Ninja AR. Enjoy all contents free of charge! [How to Play] - Find a flat surface through the camera view and tap to materialize the Math Ninja World - Find the villager with the correct answer to the formula located in the clouds - Win a card after every stage and collect a total of 50 cards! The PSG series have proven to be a big hit in Japan with 3 million downloads and over 1000 million problems solved.

About

KING OF MATH

Master arithmetic operations like addition, subtraction, multiplication, and division with this engaging learning app. It features intuitive handwriting input and adaptive difficulty to suit all ages, making learning fun and effective.

Highlights
  • Addition practice
  • Subtraction practice
  • Multiplication practice
  • Division practice
  • Handwriting input
  • Adaptive difficulty
  • Reward system
Features
Read full description

Learn and improve math and arithmetic (+ - × ÷) effectively & fast. Suitable for all ages. All math arithmetic operations (+ - × ÷) * Addition (+) * Subtraction (-) * Multiplication (× including small multiplication tables) * Division (÷) HIGHLIGHTS * Write naturally as on paper We have developed an intuitive handwriting input. * Increasing difficulty Tasks automatically adapt to the children's abilities. * Learning playfully The app motivates with great rewards and a bonus system. WHAT ELSE * No ads. * No personal data. * Fair and transparent. * Developed with teachers and educators.

Screenshots

Math Ninja AR4 screens
KING OF MATH4 screens

Verdict

The call

The clearest difference is in-app purchases: Math Ninja AR at none against KING OF MATH's 5. Math Ninja AR also leads on update cadence (every 3 weeks vs every 5 months) and rating (4.5 vs 4.3). KING OF MATH's advantage is review sentiment (44% vs 28%) and ratings volume (1.3K vs 299). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KING OF MATH sells 5 one-off in-app purchases. Math Ninja AR asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Math Ninja AR holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 299 and 1.3K respectively. Written reviews complicate that: 28% of Math Ninja AR's written reviews are positive against 44% of KING OF MATH's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Math Ninja AR ships an update every 3 weeks, KING OF MATH every 5 months. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

Scorecard6 real differences · 4 level
Math Ninja AR versus KING OF MATH: the parameters behind the verdict, then further details
ParameterMath Ninja ARKING OF MATH
PriceFreeFree
Rating4.5 (299 ratings) — better4.3 (1.3K ratings)
Positive reviews28.3% of reviews44.1% of reviews — better
Number of ratings2991.3K — better
Update frequencyEvery 3 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size157 MB102 MB
Age rating4+4+
DeveloperFantamstickwonderkind GmbH

Customer experience

Math Ninja AR

All ratings299 ratings
Positive86.3%
Neutral7.4%
Negative6.4%
Written reviews46 reviews
Positive28.3%
Neutral8.7%
Negative63.0%

KING OF MATH

All ratings1,305 ratings
Positive81.2%
Neutral9.0%
Negative9.8%
Written reviews93 reviews
Positive44.1%
Neutral15.1%
Negative40.9%

User reviews

Math Ninja AR

From 299 App Store ratings

What we love

  • 💡 Good concept
  • 💡 Fun learning
  • 👍 Interesting concept
  • 👍 Brilliant idea

Room to improve

  • 🐛 App doesn't work
  • 🐛 Doesn't load
  • 🐛 Freezes
  • 🐛 Screen flashes
  • 🐛 Incomprehensible

KING OF MATH

From 1.3K App Store ratings

What we love

  • 👍 Helps kids learn math
  • 🚀 Motivates kids to learn faster
  • 👍 Good for toddlers and young children
  • 👍 Improves math skills

Room to improve

  • 🐛 Poor handwriting recognition, especially for numbers like 6, 9
  • 🐛 Inconsistent recognition of correct answers
  • 🐛 Frustrating for kids when it doesn't register their input
  • 🐛 Needs better timer settings for beginners

Bugs and requests

Math Ninja AR

Reported bugs

9 issues
  • App doesn't work
  • Doesn't load
  • Freezes at start screen
  • Screen flashes
  • Dark screen after selecting level
Show 4 more
  • Button in foreign language
  • Missing correct answers
  • Ghost icon issue
  • Cannot delete ghost icon

Requested features

9 requests
  • Make more for all subjects
  • Combine AR with VR
  • Add instructions
  • Add difficulty settings
  • Add rewards
Show 4 more
  • Fix ghost icon issue
  • Disable download for non-AR devices
  • Add documentation
  • Add microphone/camera permission requests

KING OF MATH

Reported bugs

3 issues
  • Doesn't recognize simple numbers like 4 and 9
  • Accepts wrong answers as correct
  • Slow response time on some devices

Requested features

4 requests
  • Allow keyboard input or numeric keypad
  • Calibration option for handwriting recognition
  • Difficulty levels for different age groups
  • More advanced math operations like multiplication and division

In-app purchases

None

Math Ninja AR

No in-app purchases

5 purchases

KING OF MATH

One-time5
  • Subtraction Deck$1.99
  • Large multiplication tables$1.99
  • Small multiplication tables$1.99
Show 2 more
  • Division$1.99
  • Full Version Bundle$4.99

Questions

Is Math Ninja AR free?
Math Ninja AR is free to download, with no in-app purchases.
Is KING OF MATH free?
KING OF MATH is free to download, with in-app purchases available.
Which has better reviews, Math Ninja AR or KING OF MATH?
Math Ninja AR is rated higher. Math Ninja AR averages 4.5 out of 5 from 299 ratings, while KING OF MATH averages 4.3 from 1.3K ratings.
Do Math Ninja AR or KING OF MATH have ads?
Neither Math Ninja AR nor KING OF MATH shows ads.
Which is updated more often, Math Ninja AR or KING OF MATH?
Math Ninja AR ships an update every 3 weeks, and KING OF MATH every 5 months. Most recently, Math Ninja AR was updated on October 10, 2026 and KING OF MATH on October 16, 2026.

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