--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "ならべるくん" developer_entity: "Kouichi INAFUKU" bundle_id: "jp.co.beatnix.CardSort" app_store_id: "1551611190" category: "Education" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2023-09-06" report_date: "2026-06-27" last_verified: "2026-06-27T05:50:39.333Z" report_version: "1.0.1" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 5 intelligence_version: 3 nemesis: "Quizlet: More than Flashcards" competitor_count: 7 tags: ["education", "free", "mobile app", "app review", "app analysis", "elementary", "middle", "school"] canonical_url: "https://marlvel.ai/intel-report/education/jp-co-beatnix-cardsort" license: "CC-BY-NC 4.0" content_version: "v2" --- # ならべるくん App Audit ## TL;DR {#tldr} - **Category**: Education · Free > **TL;DR:** ならべるくん is a education app by Kouichi INAFUKU, available on iOS. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** ならべるくん is a education app by Kouichi INAFUKU. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Education | | **Developer** | Kouichi INAFUKU | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Kouichi INAFUKU - **Category:** Education - **Target Audience:** Elementary and middle school students and their teachers, specifically for use in mathematics and language arts group learning. - **Platforms:** iOS - **Version Audited:** 1.0.1 - **Audit Date:** 2026-06-27 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 1551611190 - **Bundle ID:** jp.co.beatnix.CardSort - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-06-27 ## Executive Snapshot **What it is:** ならべるくん is an educational app for elementary and middle school students that uses a drag-and-drop interface to teach logical sequencing. **Why users hire it:** Teachers hire this tool to record student reasoning processes in group settings, providing a window into how children construct logical arguments. ## App DNA (Features & Intent) - **[Standard] Logical Sequencing Tool:** Drag-and-drop interface for arranging text or image cards to construct logical explanations - **[Differentiator] Process Recording:** Captures video and audio of the student's sorting process for teacher review * *User Intent:* Users seek enhanced value through premium features. - **[Standard] Content Management:** Ability to add or delete specific problem sets within the app * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} The app occupies a niche utility space in the Education category, but the lack of rating data and updates since 2023 suggests it currently functions as a legacy tool rather than a competitive market participant. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no observable in-app purchases or subscription tiers. ## SWOT Analysis {#swot} **Core Strengths:** - Process recording mechanism enables teacher-led assessment in group learning environments **Critical Frictions:** - Zero rating count indicates negligible user adoption - No updates since 2023 **Growth Levers:** - Integration with school district IT infrastructure could establish a B2B distribution channel **Market Threats:** - AI-based homework assistants provide instant logical breakdowns, bypassing manual sorting ## Recent Changes (v2 → v3) {#recent-changes} The app's status has been downgraded from an active educational tool to a legacy asset due to a lack of updates and competitive pressure from AI-assisted homework platforms. **Overall trend**: Declining **Compared at**: 2026-06-27 ### High-impact changes - **[Shifted] Market Status Downgrade** (positioning) — Positioning shifted from a functional educational tool to a legacy asset in maintenance mode, citing no updates since 2023. ### Medium-impact changes - **[Improved] Process Recording Repositioning** (features) — Competitive position for 'Process Recording' upgraded from 'standard' to 'differentiator'. - **[Shifted] Target Audience Narrowing** (audience) — Audience scope shifted from general primary/secondary students to specific mathematics and language arts group learning contexts. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### ならべるくん vs Quizlet: More than Flashcards — Head to Head - **[Quizlet: More than Flashcards](https://marlvel.ai/intel-report/education/quizlet-more-than-flashcards)** by Quizlet Inc: Dominates the study-aid market with a massive user base and high-frequency release cadence. - **Moat strength:** High — sustainable advantage over 12 months - **Key differences:** - Leverages massive user-generated content library to provide instant study sets for any subject - Multi-modal learning modes including games, flashcards, and AI-powered Q&A beyond simple sorting ### Contenders (Strong Challengers) - **[Brainly: Your Personal Tutor](https://marlvel.ai/intel-report/education/com-brainly-us)** by Brainly sp. z o o [Moat: Medium]: Provides a social-learning network that solves the 'how to think' problem through peer-to-peer explanation. - Community-driven Q&A platform allows students to see diverse logical explanations for the same problem - Integrates social validation and expert verification to ensure the quality of logical reasoning steps - **[Kahoot! Play & Create Quizzes](https://marlvel.ai/intel-report/education/no-mobitroll-kahoot-controller)** by Kahoot ASA [Moat: High]: The standard for interactive, group-based learning sessions in classroom environments. - Real-time competitive classroom engagement mechanics drive higher session retention than individual sorting tasks - Gamified quiz creation tools allow teachers to build interactive assessments with immediate visual feedback ### Peers (What They Do Better) - **[Canvas by Instructure](https://marlvel.ai/intel-report/education/com-instructure-icanvas)** by Instructure Inc.: An enterprise-grade LMS that serves as the primary hub for the educational content our target app supports. - Centralized gradebook and assignment submission workflow creates a high-friction barrier to switching platforms - Deep integration with school district IT infrastructure makes it the default environment for student work - **[Brilliant: Learn by doing](https://marlvel.ai/intel-report/education/com-brilliant-brilliant)** by Brilliant.org: Focuses on the 'logical thinking' aspect of education through interactive, step-by-step problem solving. - Curated, high-quality interactive lessons designed to build foundational logical and mathematical intuition - Premium subscription model focuses on deep-dive learning paths rather than simple task-based sorting ### New Kids on the Block (What's Innovative) - **[Answer.AI - Your AI tutor](https://marlvel.ai/intel-report/education/com-cyberdavinci-gptkeyboard)** by ANSWER AI LAB INC: Rapidly evolving AI-tutor that provides instant logical breakdowns of homework problems. - **[Question.AI-Math Calculator](https://marlvel.ai/intel-report/education/com-qianfan-aihomework)** by 3HOUSE: Aggressive release schedule indicates a focus on rapid feature iteration for AI-assisted homework help. ## App Momentum (Steady) {#momentum} - Last major update September 2023. - No recent feature expansion. ## The "So What?" (Strategic Takeaway) {#so-what} ならべるくん is an established education app that is completely free. > **Bottom Line:** The app provides a unique pedagogical utility through process recording, but the lack of user engagement and recent updates makes it a high-risk asset, so the PM should pivot to a B2B partnership model or sunset the project. **Best for:** Elementary and middle school students and their teachers, specifically for use in mathematics and language arts group learning. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] [HIGH IMPACT] Pivot to B2B school partnerships because the current consumer-facing app lacks traction → secure institutional usage. — *Zero rating count indicates the consumer-facing strategy is not generating organic discovery or retention.* _(trade-off: deprioritize Pause all consumer-facing feature development — the current user base is too small to justify maintenance.)_ ### Feature Gaps vs Competitors - AI-powered logical breakdown (available in Question.AI but absent here) - Social-learning Q&A network (available in Brainly but absent here) ### Outlook: Declining The educational tool market is consolidating around AI-assisted homework help that provides instant feedback. Without a clear update cadence or user-engagement strategy, the app will continue to lose relevance to automated alternatives. - 🔴 The lack of updates since 2023 indicates the app is in maintenance mode, which prevents it from competing with AI-driven homework tools. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **ならべるくん** (this app) | N/A/5 | N/A | Kouichi INAFUKU | | [Answer.AI - Your AI tutor](https://marlvel.ai/intel-report/education/com-cyberdavinci-gptkeyboard) | 4.7/5 | N/A | ANSWER AI LAB INC | | [Brainly: Your Personal Tutor](https://marlvel.ai/intel-report/education/com-brainly-us) | 4.7/5 | N/A | Brainly sp. z o o | | [Brilliant: Learn by doing](https://marlvel.ai/intel-report/education/com-brilliant-brilliant) | 4.7/5 | N/A | Brilliant.org | | [Question.AI-Math Calculator](https://marlvel.ai/intel-report/education/com-qianfan-aihomework) | 4.7/5 | N/A | 3HOUSE | | [Kahoot! Play & Create Quizzes](https://marlvel.ai/intel-report/education/no-mobitroll-kahoot-controller) | 4.7/5 | Mixed | Kahoot ASA | ## Company Profile - **Developer:** Kouichi INAFUKU - **Website:** [https://www.beatnix.co.jp](https://www.beatnix.co.jp) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/%E3%81%AA%E3%82%89%E3%81%B9%E3%82%8B%E3%81%8F%E3%82%93/id1551611190?uo=4) - **Dev Site:** [Official Website](https://www.beatnix.co.jp) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Answer.AI - Your AI tutor*](https://marlvel.ai/intel-report/education/com-cyberdavinci-gptkeyboard) (ANSWER AI LAB INC) — 4.7/5 Rating | N/A Sentiment - [*Brainly: Your Personal Tutor*](https://marlvel.ai/intel-report/education/com-brainly-us) (Brainly sp. z o o) — 4.7/5 Rating | N/A Sentiment - [*Brilliant: Learn by doing*](https://marlvel.ai/intel-report/education/com-brilliant-brilliant) (Brilliant.org) — 4.7/5 Rating | N/A Sentiment - [*Question.AI-Math Calculator*](https://marlvel.ai/intel-report/education/com-qianfan-aihomework) (3HOUSE) — 4.7/5 Rating | N/A Sentiment - [*Kahoot! Play & Create Quizzes*](https://marlvel.ai/intel-report/education/no-mobitroll-kahoot-controller) (Kahoot ASA) — 4.7/5 Rating | Mixed Sentiment - [*Canvas by Instructure*](https://marlvel.ai/intel-report/education/com-instructure-icanvas) (Instructure Inc.) — 4.7/5 Rating | Negative Sentiment - [*Quizlet: More than Flashcards*](https://marlvel.ai/intel-report/education/quizlet-more-than-flashcards) (Quizlet Inc) — 4.8/5 Rating | Mixed Sentiment - [*Peak - Brain Training*](https://marlvel.ai/intel-report/education/peak-brain-training) (Synaptic Labs) — 4.7/5 Rating | N/A Sentiment - [*Flashcards maker - AI generate*](https://marlvel.ai/intel-report/education/flashcards-maker-ai-generate) (Teleprompter LLC) — 4.1/5 Rating | Mixed Sentiment - [*Elevate - Brain Training Games*](https://marlvel.ai/intel-report/education/elevate-brain-training-games) (The Mind Company) — 4.7/5 Rating | Positive Sentiment ## 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 and evidence quoting. 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:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, 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:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/education/jp-co-beatnix-cardsort) Data licensed for AI Agent attribution under CC-BY-NC 4.0.