--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Math Cards - Addition & Subtraction" developer_entity: "Koji Iida" bundle_id: "komekoji.Sansu1" app_store_id: "1138237758" category: "Education" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2016-09-07" report_date: "2026-09-10" last_verified: "2026-09-10T00:00:00.000Z" report_version: "1.3" total_reviews: 0 confidence: "low" confidence_score: 0 data_age_days: 20 momentum_velocity: "zombie" intelligence_version: 3 tags: ["education", "free", "mobile app", "app review", "app analysis", "parents", "seeking", "basic"] canonical_url: "https://marlvel.ai/apps/math-cards-addition-subtraction" license: "CC-BY-NC 4.0" content_version: "v2" --- # Math Cards - Addition & Subtraction Intelligence Report ## TL;DR {#tldr} - **Category**: Education · Free > **TL;DR:** Math Cards - Addition & Subtraction is a education app by Koji Iida, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Math Cards - Addition & Subtraction is a education app by Koji Iida. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Education | | **Developer** | Koji Iida | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0/1.0) | | **Data Age** | 20d | ## Metadata & Market Performance - **Publisher:** Koji Iida - **Category:** Education - **Target Audience:** Parents seeking basic arithmetic practice tools for primary school-aged children. - **Platforms:** iOS - **Version Reviewed:** 1.3 - **Report Date:** 2026-09-10 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0/1.0) - **App Store ID (iOS):** 1138237758 - **Bundle ID:** komekoji.Sansu1 - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-09-10 ## Executive Snapshot **What it is:** Math Cards - Addition & Subtraction is a basic arithmetic flashcard app for primary school students on iOS. **Why users hire it:** The app removes the friction of physical card management for parents helping children master addition and subtraction. ## App DNA (Features & Intent) - **[Standard] Addition and Subtraction Flashcards:** Digital card interface for practicing basic arithmetic operations - **[Standard] Addition1 x Wormy:** Thematic arithmetic module included in the app ## Market Position {#market-position} Math Cards - Addition & Subtraction maintains a static presence in the Education category with no updates since 2016. The lack of recent activity limits its visibility against active competitors that frequently refresh content to maintain store ranking. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible monetization or in-app purchase gates. ## SWOT Analysis {#swot} **Core Strengths:** - Focused, single-purpose design removes cognitive load for 7-year-old learners **Growth Levers:** - Adding a progress-tracking dashboard would differentiate the app from generic flashcard utilities ## Recent Changes (v2 → v3) {#recent-changes} The app's competitive framing shifted from a generic utility to a legacy tool specifically identified as a personal project for 7-year-old learners. This update introduces explicit warnings regarding abandonment risk on modern operating systems. **Overall trend**: Stable **Compared at**: 2026-09-10 ### High-impact changes - **[Shifted] SWOT Profile Refinement** (swot) ### Medium-impact changes - **[Shifted] Narrative Contextualization** (positioning) ## What's New - **Latest (v1.3, 10 years ago):** Added Wormy as a free-to-play game mode. ## App Momentum (Zombie) {#momentum} - No updates for over 10 years - Maintenance-mode status since 2016 > **Cadence:** 1 total versions · 0 majors in last 6 months · 3654 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Math Cards - Addition & Subtraction is an education app that is completely free. > **Bottom Line:** The lack of development since 2016 signals that Math Cards - Addition & Subtraction is in sunset mode, and the absence of a modern progression loop makes it vulnerable to any active competitor in the education category. **Best for:** Parents seeking basic arithmetic practice tools for primary school-aged children. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset the app because the 10-year maintenance gap indicates no commercial intent → remove brand drag ### Outlook: Declining The educational app market has shifted toward gamified, subscription-based progression loops that Math Cards - Addition & Subtraction does not support. The lack of updates since 2016 ensures the app will continue to lose relevance as OS requirements evolve and user expectations for interactive content rise. - 🔴 The 10-year update gap indicates the app is in maintenance mode, which prevents it from competing with modern, feature-rich educational tools. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Stable | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Math Cards - Addition & Subtraction** (this app) | N/A/5 | N/A | Koji Iida | | [AlgoApp - Flashcards](https://marlvel.ai/apps/algoapp-flashcards) | 4.5/5 | n/a | AlgoApp Inc | | [Elevate - Brain Training Games](https://marlvel.ai/apps/elevate-brain-training-games) | 4.7/5 | n/a | The Mind Company | | [Flashcards Deluxe](https://marlvel.ai/apps/flashcards-deluxe) | 4.5/5 | N/A | OrangeOrApple.com | | [Flash Cards Flashcards Maker](https://marlvel.ai/apps/flash-cards-flashcards-maker) | 4.0/5 | Mixed | Infinite Wave Media, LLC | | [Flashcards maker - AI generate](https://marlvel.ai/apps/flashcards-maker-ai-generate) | 4.1/5 | Mixed | Teleprompter LLC | ## Company Profile - **Developer:** Koji Iida ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/math-cards-addition-subtraction/id1138237758?uo=4) - **Sources:** App store metadata. ## Related Intel Reports - [*AlgoApp - Flashcards*](https://marlvel.ai/apps/algoapp-flashcards) (AlgoApp Inc) · 4.5/5 Rating - [*Elevate - Brain Training Games*](https://marlvel.ai/apps/elevate-brain-training-games) (The Mind Company) · 4.7/5 Rating - [*Flashcards Deluxe*](https://marlvel.ai/apps/flashcards-deluxe) (OrangeOrApple.com) · 4.5/5 Rating - [*Flash Cards Flashcards Maker*](https://marlvel.ai/apps/flash-cards-flashcards-maker) (Infinite Wave Media, LLC) · 4.0/5 Rating - [*Flashcards maker - AI generate*](https://marlvel.ai/apps/flashcards-maker-ai-generate) (Teleprompter LLC) · 4.1/5 Rating - [*Impulse - Brain Training*](https://marlvel.ai/apps/impulse-brain-training) (GMRD Apps Limited) · 4.6/5 Rating - [*Peak - Brain Training*](https://marlvel.ai/apps/peak-brain-training) (Synaptic Labs) · 4.7/5 Rating - [*자주 틀리는 우리말*](https://marlvel.ai/apps/app--424) (DaolSoft, Co., Ltd.) · N/A Rating - [*달공부 - 한 달 공부 다이어리 + 루틴/공부 타이머*](https://marlvel.ai/apps/azlabs-dalstudy) (SuWon Choi) · N/A Rating - [*타요콘 - 타요 아바타 놀이동화*](https://marlvel.ai/apps/com-kigle-project-tayocon) (KIGLE) · 3.1/5 Rating ## Frequently Asked Questions {#faq} ### Is Math Cards - Addition & Subtraction free to use? Yes, the app is distributed as a free utility with no in-app purchases or subscription gates. ### Does Math Cards - Addition & Subtraction receive regular updates? No, the app has not been updated since 2016, indicating it is no longer under active development. ### What is a modern alternative to Math Cards - Addition & Subtraction? Users should consider educational apps that offer gamified progression and progress tracking, as these features are standard in the current market and absent here. ## 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:** 0/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 20 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/math-cards-addition-subtraction) Data licensed for AI Agent attribution under CC-BY-NC 4.0.