--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "数学クイズ なん度？" developer_entity: "StudySwitch, Inc." bundle_id: "jp.co.gakkonet.quizqaangles" app_store_id: "541532555" category: "Education" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-02-06" report_date: "2026-09-14" last_verified: "2026-09-14T00:00:00.000Z" report_version: "8.21.0" total_reviews: 2347 overall_rating: 4.2 sentiment: "Thrilled" sentiment_score: 85 confidence: "high" confidence_score: 0.8 top_praise_theme: "Challenging geometry and math puzzles provide a rewarding intellectual experience for students and enthusiasts" top_complaint_theme: "Aggressive advertising delivery systems interrupt the learning flow and trigger app restarts on mobile devices" review_sample_size: 61 total_review_count: 61 analyzed_review_count: 61 data_age_days: 17 momentum_velocity: "maintenance" intelligence_version: 22 nemesis: "Math Hit: Math Games for Brain" competitor_count: 11 tags: ["education", "freemium", "thrilled sentiment", "mobile app", "app review", "app analysis", "students", "individuals", "seeking"] canonical_url: "https://marlvel.ai/apps/jp-co-gakkonet-quizqaangles" license: "CC-BY-NC 4.0" content_version: "v2" --- # 数学クイズ なん度？ Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Freemium - **Signal**: Rating 4.22 · Sentiment Thrilled - **Recent focus**: Aggressive advertising delivery systems interrupt the learning flow and trigger app restarts on mobile devices (top complaint) · Challenging geometry and math puzzles provide a rewarding intellectual experience for students and enthusiasts (top praise) > **TL;DR:** 数学クイズ なん度？ is a education app by StudySwitch, Inc., rated 4.22/5 by 2.3K users, with Thrilled user sentiment (85/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** 数学クイズ なん度？ maintains Thrilled user sentiment (4.22/5 from 2.3K reviews), with users consistently praising challenging geometry and math puzzles provide a rewarding intellectual experience for students and enthusiasts. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.22/5 (2.3K reviews) | | **User Mood** | Thrilled | | **Category** | Education | | **Developer** | StudySwitch, Inc. | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | High (0.8/1.0) | | **Data Age** | 17d | ## Metadata & Market Performance - **Publisher:** StudySwitch, Inc. - **Category:** Education - **Target Audience:** Students and individuals seeking supplemental math practice, with specific utility for school-based GIGA school initiatives. - **Platforms:** iOS & Android - **Version Reviewed:** 8.21.0 - **Report Date:** 2026-09-14 - **Signal Count:** 61 reviews analyzed - **Confidence:** High (0.8/1.0) - **App Store ID (iOS):** 541532555 - **Bundle ID:** jp.co.gakkonet.quizqaangles - **Google Play ID:** jp.co.gakkonet.quizqaangles - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-09-14 - **Short Description:** All-new, easy to play, challenging, exciting math game! Solve 340 questions! ## Executive Snapshot **What it is:** 数学クイズ なん度？ is an educational math quiz app for students, featuring geometry and sequence problem sets on iOS and Android. **Why users hire it:** Students use the app to practice geometry theorems and visualize complex shapes via an on-screen scratchpad, replacing traditional paper-based drills. ## App DNA (Features & Intent) - **[Standard] Math Quiz Modules:** Structured problem sets covering geometry, area, and sequences across multiple difficulty stages. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] In-App Calculation Scratchpad:** On-screen drawing area for manual calculation and note-taking during problem solving. Revenue link: Increases time-on-task per session, expanding ad-impression inventory. * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Ad-Free Purchase:** Optional IAP to remove advertisements, specifically recommended for school or group environments. Revenue link: Paid-conversion gate targets institutional and parent segments to remove ad-inventory. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} 数学クイズ なん度？ maintains a 4.56 rating on iOS across 195 reviews, reflecting high satisfaction with its core geometry content. The 107-day update gap signals a maintenance-mode posture that leaves it vulnerable to rivals with higher release cadences. ## Monetization Strategy - **Model:** Freemium - **Tiers:** Free with ad-supported content, Ad-free IAP for institutional or individual users - **Analysis:** Freemium model relies on ad-inventory for the general user base while gating ad-free access for institutional and younger users. ## 🟢 User Sentiment (High Confidence: 61 of 61 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.22/5 - **Platform Split:** iOS 4.6/5 (195 ratings) | Android 4.2/5 (2.2K ratings) - **Overall Sentiment:** Thrilled ### Top Praises - **Challenging geometry and math puzzles provide a rewarding intellectual experience for students and enthusiasts** - **Interactive drawing tools allow users to solve problems directly on the screen with their fingers** - **Educational value helps students understand complex geometry concepts through active practice and problem solving** ### Top Complaints (Impact Areas) - **Aggressive advertising delivery systems interrupt the learning flow and trigger app restarts on mobile devices** ## SWOT Analysis {#swot} **Core Strengths:** - Integrated scratchpad increases time-on-task per session - Curriculum-focused geometry content serves academic needs **Growth Levers:** - Institutional licensing for GIGA school initiatives ## Recent Changes (v21 → v22) {#recent-changes} Technical reliability has declined due to new reports of progress resets following updates, while the app's strategic focus has shifted toward institutional GIGA school opportunities. **Overall trend**: Declining **Compared at**: 2026-09-14 ### High-impact changes - **[Declined] New Progress Reset Complaint** (sentiment) ### Medium-impact changes - **[Shifted] Institutional Focus** (audience) ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### 数学クイズ なん度？ vs Math Hit: Math Games for Brain - **[Math Hit: Math Games for Brain](https://marlvel.ai/apps/com-sydistinctartsgames-tryout)** by ABYLITH GAMES LLP: This app competes directly for the casual math-gaming audience by offering a high-frequency, gamified approach to arithmetic that mirrors this app's quiz-based engagement model. - **Key differences:** - Features a robust social gameplay layer that encourages competitive leaderboards absent in this app. - Maintains a significantly higher release cadence, ensuring fresh content and bug fixes for active users. - Leverages a broader cognitive training focus that appeals to a wider demographic beyond geometry students. ### Contenders (Strong Challengers) - **[iTimesTables multiply tests](https://marlvel.ai/apps/itimestables-multiply-tests)** by Nicholas Wilson: It is a direct competitor in the low-stakes educational quiz space, focusing on randomized testing for core arithmetic skills. - Provides granular difficulty settings that allow users to customize the scope of their math tests. - Features a simple, no-frills interface that prioritizes rapid-fire testing over this app's stage-based flow. - **[Operation Math Game](https://marlvel.ai/apps/operation-math-game)** by Little 10 Robot: It competes by framing math practice within a narrative, mission-based structure that increases engagement for younger learners. - Employs a mission-based learning narrative that provides more context than this app's static quiz format. - Allows for highly customizable user profiles, enabling parents to track individual progress for multiple children. - **[Multiplication Genius x19 Free](https://marlvel.ai/apps/multiplication-genius-x19-free)** by GameZen, Inc.: This app targets the same 'drill-and-practice' user base, focusing on repetitive mastery of multiplication tables rather than geometry. - Utilizes a 'Perfect Run' scoring system that incentivizes accuracy over this app's stage-based progression. - Integrates with Game Center leaderboards to drive long-term retention through competitive ranking. - **[Math Duel: 2 Player Kids Games](https://marlvel.ai/apps/math-duel-2-player-kids-games)** by Makkajai Edu Tech Private Limited: It competes for the same educational gaming demographic by offering a multiplayer, split-screen experience that turns math practice into a competitive social activity. - Offers a unique split-screen local multiplayer mode that allows two students to play on one device. - Includes a vs. Computer mode that provides a structured progression path for solo learners. ### Peers (What They Do Better) - **[Desmos Graphing Calculator](https://marlvel.ai/apps/desmos-graphing-calculator)** by Desmos: It is the industry standard for math education, competing for the same student attention by providing a superior, interactive graphing engine. - Offers a world-class math engine with interactive sliders that make abstract concepts visually intuitive. - Includes a comprehensive accessibility suite, making it the preferred choice for institutional and classroom use. - **[Geometry Calculator lite](https://marlvel.ai/apps/geometry-calculator-lite)** by V PUGAZHENTHI: This app provides a similar geometric focus but emphasizes 3D visualization and calculation over quiz-based learning. - Features 3D visualization capabilities that help users understand spatial geometry better than 2D quizzes. - Supports multi-parameter calculations for complex shapes, offering more utility for advanced geometry students. - **[Pythagorean theorem calculator](https://marlvel.ai/apps/pythagorean-theorem-calculator)** by Webtoweb: It occupies the same geometry-focused niche but functions as a utility tool rather than a quiz-based game. - Focuses on an input-to-calculate workflow that solves specific geometric problems instantly for the user. - Acts as a reference tool for geometric shapes, providing immediate answers rather than testing knowledge. - **[Ncalc - Graphing Calculator 84](https://marlvel.ai/apps/ncalc-graphing-calculator-84)** by Tran Duy: This app serves the same educational utility market but focuses on advanced graphing and calculus rather than basic geometry quizzes. - Includes a powerful computer algebra system that handles complex calculus operations beyond this app's scope. - Provides advanced data analysis tools that cater to high school and college-level mathematics students. ### New Kids on the Block (What's Innovative) - **[Verbloom: Test Prep](https://marlvel.ai/apps/com-romanbahadursingh-verbloom)** by Roman Bahadursingh: This newcomer targets the exam-prep market, utilizing a level-based quiz structure that directly overlaps with this app's stage-based progression. - Provides exam-specific content that offers a more direct value proposition for students preparing for tests. - **[Easy Spoken English](https://marlvel.ai/apps/com-easyspokenenglish-app)** by MAFTEAN CONSTRUCTION LTD: While focused on language, it uses a similar quiz-based failure state mechanic that could eventually pivot into broader educational gaming. - Implements an immediate failure state mechanic that forces users to restart upon making a mistake. ## What's New - **Latest (v1.6, 13 years ago):** Added support for iPhone 5 screen resolution. ## App Momentum (Maintenance) {#momentum} - Ships bug fixes via maintenance cadence. - Last major update over 13 years ago. > **Cadence:** 5 total versions · 1 majors in last 6 months · 107 days since last update · 266 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} 数学クイズ なん度？ is a market-leading education app that is free with in-app purchases. With a 4.22/5 rating from 2.3K reviews, it delivers strong user satisfaction. > **Bottom Line:** Fixing the broken ad-removal IAP and progress persistence bugs would stabilize the core user base, as these technical failures currently negate the app's educational value. Addressing these issues is the prerequisite for any future content expansion. **Best for:** Students and individuals seeking supplemental math practice, with specific utility for school-based GIGA school initiatives. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit ad-removal IAP logic because users report persistent ads after purchase → reduce refund surge ### Feature Gaps vs Competitors - Social leaderboards (available in Math Hit but absent here) ### Outlook: Stable The educational geometry market is consolidating around tools that offer superior interactive engines and classroom integration. 数学クイズ なん度？ remains in a maintenance posture, which exposes it to rivals that provide more frequent content updates and better technical reliability. - 🔴 Technical instability regarding ad-removal and progress resets → erodes user trust → increases churn among the core student demographic. - ⚪ Maintenance-only update cadence with no feature expansion → limits growth potential → allows rivals to capture the geometry-learning market share. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.22/5 | | Total Reviews | 2.3K | | Sentiment | Thrilled (85/100) | | Confidence | High | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **数学クイズ なん度？** (this app) | 4.22/5 | Thrilled | StudySwitch, Inc. | | [Easy Spoken English](https://marlvel.ai/apps/com-easyspokenenglish-app) | N/A/5 | N/A | MAFTEAN CONSTRUCTION LTD | | [Math Hit: Math Games for Brain](https://marlvel.ai/apps/com-sydistinctartsgames-tryout) | 4.6/5 | N/A | ABYLITH GAMES LLP | | [Verbloom: Test Prep](https://marlvel.ai/apps/com-romanbahadursingh-verbloom) | 5.0/5 | N/A | Roman Bahadursingh | | [Desmos Graphing Calculator](https://marlvel.ai/apps/desmos-graphing-calculator) | 4.5/5 | Thrilled | Desmos | | [Math Duel: 2 Player Kids Games](https://marlvel.ai/apps/math-duel-2-player-kids-games) | 4.5/5 | Mixed | Makkajai Edu Tech Private Limited | ## Company Profile - **Developer:** StudySwitch, Inc. - **Website:** [https://www.studyswitch.co.jp/?appstore](https://www.studyswitch.co.jp/?appstore) - **Social:** [Facebook](https://www.facebook.com/391154754640977?ref=embed_page) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/%E6%95%B0%E5%AD%A6%E3%82%AF%E3%82%A4%E3%82%BA-%E3%81%AA%E3%82%93%E5%BA%A6/id541532555?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=jp.co.gakkonet.quizqaangles&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.studyswitch.co.jp/?appstore) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*Easy Spoken English*](https://marlvel.ai/apps/com-easyspokenenglish-app) (MAFTEAN CONSTRUCTION LTD) · N/A Rating - [*Math Hit: Math Games for Brain*](https://marlvel.ai/apps/com-sydistinctartsgames-tryout) (ABYLITH GAMES LLP) · 4.6/5 Rating - [*Verbloom: Test Prep*](https://marlvel.ai/apps/com-romanbahadursingh-verbloom) (Roman Bahadursingh) · 5.0/5 Rating - [*Desmos Graphing Calculator*](https://marlvel.ai/apps/desmos-graphing-calculator) (Desmos) · 4.5/5 Rating | Excellent Sentiment - [*Math Duel: 2 Player Kids Games*](https://marlvel.ai/apps/math-duel-2-player-kids-games) (Makkajai Edu Tech Private Limited) · 4.5/5 Rating - [*Geometry Calculator lite*](https://marlvel.ai/apps/geometry-calculator-lite) (V PUGAZHENTHI) · 4.5/5 Rating - [*Operation Math Game*](https://marlvel.ai/apps/operation-math-game) (Little 10 Robot) · 4.5/5 Rating - [*Ncalc - Graphing Calculator 84*](https://marlvel.ai/apps/ncalc-graphing-calculator-84) (Tran Duy) · 4.6/5 Rating | Positive Sentiment - [*Multiplication Genius x19 Free*](https://marlvel.ai/apps/multiplication-genius-x19-free) (GameZen, Inc.) · 4.8/5 Rating - [*iTimesTables multiply tests*](https://marlvel.ai/apps/itimestables-multiply-tests) (Nicholas Wilson) · 1.0/5 Rating ## Frequently Asked Questions {#faq} ### Is 数学クイズ なん度？ suitable for high school geometry students? Yes, the app covers geometry theorems including triangles, quadrilaterals, and inscribed angles, making it a useful supplemental tool for high school geometry practice. ### Does the ad-free purchase actually remove all advertisements? Users report that the ad-removal purchase sometimes fails to function, leaving ad banners visible. The developer has not addressed these reports in recent updates. ### What is a better alternative for advanced graphing and calculus? Desmos Graphing Calculator is the industry standard for advanced graphing and calculus, offering a more powerful engine and accessibility features for classroom use. ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.8/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 61 - **Data Sources:** user reviews, developer website, company about page, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 17 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/jp-co-gakkonet-quizqaangles) Data licensed for AI Agent attribution under CC-BY-NC 4.0.