Comparison

Omusubi Kororin vs Mathmate3

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

Head to head
About

Omusubi Kororin

Features
Read full description

Improve your Japanese reading skills with the charming folk tale 'Omusubi Kororin' (The Rolling Rice Ball)! This app offers a side-by-side bilingual reading experience in Japanese and English, designed to help you acquire vocabulary and understand grammar in context. Follow the heartwarming story of an honest old man whose dropped rice ball leads him to a magical underground world of singing and dancing mice. Perfect for beginner learners (JLPT N5), this app bridges the gap between textbooks and native literature with built-in furigana, romaji, and interactive reading aids.

About

Mathmate3

Features
Read full description

Replace stacks of math workbooks with one smart app. Get a comprehensive Year 3 & 4 curriculum for fraction the cost of one book. Mathmate 3 is a digital exercise book that prioritizes structured practice and genuine skill development. Thoughtfully designed to maximize learning with minimal screen time, while making it easier for parents to support their child's education. KEY FEATURES: - Comprehensive Curriculum: Covers the Year 3 & 4 math syllabus across 10+ core topics and 100+ units. - Infinite Practice: Unlike paper books, kids will never run out of new exercises. - Instant Feedback: Automated checking provides immediate corrections for kids. Save parents hours of grading time. - Design for Focus Learning: Subtle animations and sounds celebrate progress without over-stimulation. Perfect for focused, 15โ€“30 minute daily sessions. - Kid Safe: Zero data tracking or sharing, no ads, no distracting social features. - Works offline without internet. No in-app purchases, premium features, or billing surprises. - Smart Recommendations: Automatically encourages learning across wide range of primary school math topics, while focusing effort on areas needing extra support. - Clear Progress Reporting: Detailed insights across all development areas to help parents better understand and support their child's growth.

Screenshots

Omusubi Kororin4 screens
Mathmate34 screens

Verdict

The call

The clearest difference is price: Mathmate3 at Free against Omusubi Kororin's $0.99. Mathmate3 also leads on update cadence (every 11 days vs monthly) and iOS requirement (13.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Mathmate3 is free to download; Omusubi Kororin costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Omusubi Kororin ships an update monthly, Mathmate3 every 11 days. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.

Scorecard3 real differences ยท 3 level
Omusubi Kororin versus Mathmate3: the parameters behind the verdict, then further details
ParameterOmusubi KororinMathmate3
Price$0.99Free โ€” better
Update frequencyMonthlyEvery 11 days โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS18.213.0 โ€” better
Further details โ€” not scored
Size323 MB27 MB
Age rating4+4+
DeveloperJeffrey DickAnh Do

In-app purchases

None

Omusubi Kororin

No in-app purchases

None

Mathmate3

No in-app purchases

Questions

Is Omusubi Kororin free?
Omusubi Kororin costs $0.99, with no in-app purchases.
Is Mathmate3 free?
Mathmate3 is free to download, with no in-app purchases.
Do Omusubi Kororin or Mathmate3 have ads?
Neither Omusubi Kororin nor Mathmate3 shows ads.
Which is updated more often, Omusubi Kororin or Mathmate3?
Omusubi Kororin ships an update monthly, and Mathmate3 every 11 days. Most recently, Omusubi Kororin was updated on September 18, 2026 and Mathmate3 on September 24, 2026.

Other comparisons