Omusubi Kororin vs Mathmate3
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Omusubi Kororin
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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.
Mathmate3
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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, 15โ30 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
Verdict
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
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.
Omusubi Kororin ships an update monthly, Mathmate3 every 11 days. The most recent releases landed on September 18, 2026 and September 24, 2026 respectively.
| Parameter | Omusubi Kororin | Mathmate3 |
|---|---|---|
| Price | $0.99 | Free โ better |
| Update frequency | Monthly | Every 11 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 18.2 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 323 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Jeffrey Dick | Anh Do |
In-app purchases
Omusubi Kororin
No in-app purchases
Mathmate3
No in-app purchases
Questions
Is Omusubi Kororin free?
Is Mathmate3 free?
Do Omusubi Kororin or Mathmate3 have ads?
Which is updated more often, Omusubi Kororin or Mathmate3?
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