Comparison

ScratchJr vs Math Ninja Dojo

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

Head to head
About

ScratchJr

This app allows young children to create their own interactive stories and games by snapping together graphical programming blocks. It fosters problem-solving, creative expression, and develops early numeracy and literacy skills in a fun, motivating context.

Highlights
  • Program interactive stories
  • Create games
  • Snap-together programming blocks
  • Develop problem-solving skills
  • Foster creative expression
  • Learn coding fundamentals
Features
Read full description

With ScratchJr, young children (ages 5-7) learn important new skills as they program their own interactive stories and games. By snapping together graphical programming blocks, children can make characters move, jump, dance, and sing. In the process, children learn to solve problems, design projects, and express themselves creatively on the computer. They also use math and language in a meaningful and motivating context, supporting the development of early-childhood numeracy and literacy. With ScratchJr, children don’t just learn to code, they code to learn. ScratchJr was inspired by the popular Scratch programming language (http://scratch.mit.edu), used by millions of people (ages 8 and up) around the world. The ScratchJr interface and programming language were redesigned to make them appropriate for younger children’s cognitive, personal, social, and emotional development. ScratchJr is a collaboration between the Lifelong Kindergarten research group at the MIT Media Lab, the Developmental Technologies research group at Tufts University, and the Playful Invention Company. The ScratchJr project has received generous financial support from the National Science Foundation (NSF DRL-1118664), Scratch Foundation, LEGO Foundation, and British Telecommunications. If you enjoy using this free app, please consider making a donation to the Scratch Foundation (www.scratchfoundation.org), a nonprofit organization that provides ongoing support for ScratchJr. We appreciate donations of all sizes, large and small.

About

Math Ninja Dojo

This educational game helps children improve their math skills through fast-paced challenges. Players practice addition, subtraction, multiplication, and division with engaging exercises and customizable difficulty. It offers a fun way to build confidence and master math concepts.

Highlights
  • Addition, subtraction, multiplication, division practice
  • Engaging exercises and colorful challenges
  • Customizable difficulty and operations
  • High score tracking
  • No ads or distractions
Features
Read full description

Fun Math Dojo is a fun and fast-paced math game for kids! Designed to help children improve their math skills while having fun, this educational game challenges players to solve math problems quickly and accurately. Your child will practice addition, subtraction, multiplication, and division through engaging exercises and colorful challenges. Choose the operations you want to train and try to beat your high score! Perfect for: - Kids learning math at school or home - Parents looking for educational apps - Quick brain training sessions - Improving mental math and confidence Why you'll love it: - Simple and intuitive interface - Colorful graphics and friendly characters - Customizable difficulty and operations - No ads or distractions – just learning through play Start your child’s journey to math mastery today! Download now and make math fun again!

Screenshots

ScratchJr1 screens
Math Ninja Dojo4 screens

Verdict

The call

The clearest difference is price: ScratchJr at Free against Math Ninja Dojo's $0.99. ScratchJr also leads on in-app purchases (none vs 5) and review sentiment (67% vs 54%). Math Ninja Dojo's advantage is rating (4.5 vs 3.9). On update cadence, ads and device support 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

ScratchJr is free to download; Math Ninja Dojo costs $0.99 up front. Math Ninja Dojo sells 5 one-off in-app purchases. ScratchJr asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Math Ninja Dojo holds the better App Store score, 4.5 against 3.9. Both are backed by a comparable volume of ratings — 1.9K and 386 respectively. Written reviews complicate that: 67% of ScratchJr's written reviews are positive against 54% of Math Ninja Dojo's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

ScratchJr ships an update every 6 months, Math Ninja Dojo every 4 months. The most recent releases landed on November 1, 2026 and October 22, 2026 respectively.

Scorecard7 real differences · 3 level
ScratchJr versus Math Ninja Dojo: the parameters behind the verdict, then further details
ParameterScratchJrMath Ninja Dojo
PriceFree — better$0.99
Rating3.9 (1.9K ratings)4.5 (386 ratings) — better
Positive reviews66.9% of reviews — better53.8% of reviews
Number of ratings1.9K — better386
Update frequencyEvery 6 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size51 MB75 MB
Age rating4+4+
DeveloperScratch Foundation, Inc.Shining Muffin LLC

Customer experience

ScratchJr

All ratings1,812 ratings
Positive72.5%
Neutral7.1%
Negative20.4%
Written reviews598 reviews
Positive66.9%
Neutral10.9%
Negative22.2%

Math Ninja Dojo

All ratings374 ratings
Positive86.9%
Neutral4.3%
Negative8.8%
Written reviews13 reviews
Positive53.8%
Neutral0.0%
Negative46.2%

User reviews

ScratchJr

From 1.9K App Store ratings

What we love

  • 👍 Easy to use for kids
  • 🚀 Great for coding and creating animations
  • 💡 Allows customization of characters and backgrounds
  • ⭐ Fun and engaging for young users

Room to improve

  • 🐛 Glitchy drawing/editing tools
  • 🔧 Limited number of frames/scenes per project
  • 🎨 Lack of color options and customization
  • 🔊 Poor audio quality and limited sound options

Math Ninja Dojo

From 386 App Store ratings

What we love

  • 👍 Helps kids learn
  • 👍 Kids loved it
  • 👍 Teaches kids well
  • 👍 Good game

Room to improve

  • 🤔 Math equations too hard
  • 🤔 Missing decimal answers
  • 🤔 No age options
  • 🤔 Multiplication/division too early
  • 🤔 Needs regrouping for addition/subtraction

Bugs and requests

ScratchJr

Reported bugs

4 issues
  • Freezing and crashing issues
  • Incorrect character movements and positioning
  • Saving and loading problems
  • Microphone and recording bugs

Requested features

5 requests
  • Add more frames/scenes per project
  • Improve drawing/editing tools
  • Expand color and customization options
  • Enhance audio features and sound library
  • Integrate with the full Scratch platform

Math Ninja Dojo

Reported bugs

3 issues
  • 🐛 Missing 4.5 as an answer option
  • 🐛 Incorrect answer options for basic division
  • 🐛 Unclear math problems (e.g., 'something / something')

Requested features

2 requests
  • Option for age-specific content
  • Regrouping for addition and subtraction

In-app purchases

None

ScratchJr

No in-app purchases

5 purchases

Math Ninja Dojo

One-time5
  • Skip x10$0.99
  • Timer x20$0.99
  • Bomb x5$0.99
Show 2 more
  • Retry x5$0.99
  • Pro Version$1.99

Questions

Is ScratchJr free?
ScratchJr is free to download, with no in-app purchases.
Is Math Ninja Dojo free?
Math Ninja Dojo costs $0.99, and also offers in-app purchases.
Which has better reviews, ScratchJr or Math Ninja Dojo?
Math Ninja Dojo is rated higher. ScratchJr averages 3.9 out of 5 from 1.9K ratings, while Math Ninja Dojo averages 4.5 from 386 ratings.
Do ScratchJr or Math Ninja Dojo have ads?
Neither ScratchJr nor Math Ninja Dojo shows ads.
Which is updated more often, ScratchJr or Math Ninja Dojo?
ScratchJr ships an update every 6 months, and Math Ninja Dojo every 4 months. Most recently, ScratchJr was updated on November 1, 2026 and Math Ninja Dojo on October 22, 2026.

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