--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Mahjong Score Calculator(sanma" developer_entity: "Sayuri Yamazaki" bundle_id: "net.makosoyo.MahjongScoreCalculator" app_store_id: "6740174129" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-07-29" report_date: "2026-08-27" last_verified: "2026-08-27T00:00:00.000Z" report_version: "2.2.1" total_reviews: 0 confidence: "low" confidence_score: 0.3 data_age_days: 34 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "mahjong", "players", "seeking"] canonical_url: "https://marlvel.ai/apps/mahjong-score-calculator-sanma" license: "CC-BY-NC 4.0" content_version: "v2" --- # Mahjong Score Calculator(sanma Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free > **TL;DR:** Mahjong Score Calculator(sanma is a utilities app by Sayuri Yamazaki, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Mahjong Score Calculator(sanma is a utilities app by Sayuri Yamazaki. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Utilities | | **Developer** | Sayuri Yamazaki | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 34d | ## Metadata & Market Performance - **Publisher:** Sayuri Yamazaki - **Category:** Utilities - **Target Audience:** Mahjong players seeking digital tools to calculate scores and track match statistics for both 3-player and 4-player games. - **Platforms:** iOS - **Version Reviewed:** 2.2.1 - **Report Date:** 2026-08-27 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6740174129 - **Bundle ID:** net.makosoyo.MahjongScoreCalculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-27 ## Executive Snapshot **What it is:** Mahjong Score Calculator (sanma) is a utility app for calculating Mahjong scores and managing match records on iOS. **Why users hire it:** It removes the cognitive load of manual Fu and Tsumo-loss calculations, which are often complex in 3-player Mahjong formats. ## App DNA (Features & Intent) - **[Differentiator] Sanma Tsumo Calculation:** Specialized scoring logic for 3-player Mahjong including Tsumo-loss rules. - **[Standard] Score Calculator:** Automated calculation of Mahjong scores including Fu and Mangan logic. - **[Standard] Match Record Management:** Tracks match history, player lists, and statistics over custom periods. * *User Intent:* Users value self-expression and personalized experiences. ## Market Position {#market-position} Mahjong Score Calculator (sanma) occupies a niche utility space as a free, ad-free tool for scorekeeping. Its lack of monetization signals a focus on community utility rather than revenue generation. ## Monetization Strategy - **Model:** Free - **Tiers:** Fully free access - **Analysis:** The app is distributed as a free utility with no in-app purchases or subscription gates. ## SWOT Analysis {#swot} **Core Strengths:** - Specialized Sanma scoring logic removes manual calculation friction. **Growth Levers:** - Cloud-sync for match records would increase user retention. ## Recent Changes (v2 → v3) {#recent-changes} The app expanded its scoring logic to include M.League standards and repositioned its ad-free model as a primary competitive differentiator. **Overall trend**: Stable **Compared at**: 2026-08-27 ### Medium-impact changes - **[Added] M.League Scoring Support** (features) - **[Shifted] Monetization Narrative** (positioning) ### Low-impact changes - **[Added] Refined SWOT Analysis** (swot) ## What's New - **Latest (v2.2.1, 4 weeks ago):** Addressed minor bugs and stability issues. ## App Momentum (Maintenance) {#momentum} - Ships bug fixes at 28-day cadence. - No new features in recent patches. > **Cadence:** 1 total versions · 0 majors in last 6 months · 28 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Mahjong Score Calculator(sanma is an utilities app that is completely free. > **Bottom Line:** Mahjong Score Calculator (sanma) serves its core utility function well, but its maintenance-only posture limits its growth potential. Prioritizing a cloud-sync feature would provide a clear differentiator for users who currently rely on local-only storage. **Best for:** Mahjong players seeking digital tools to calculate scores and track match statistics for both 3-player and 4-player games. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit user-requested features because the current maintenance cadence risks stagnation → maintain utility relevance ### Outlook: Stable The utility market for Mahjong scoring is currently stable, with most users prioritizing accuracy and speed over social features. Mahjong Score Calculator (sanma) remains well-positioned for its current audience, but will need to introduce cloud-based sync to prevent churn as users seek more persistent data management. - ⚪ The app ships bug fixes at a 28-day cadence, indicating a stable but maintenance-only development posture. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Mahjong Score Calculator(sanma** (this app) | N/A/5 | N/A | Sayuri Yamazaki | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.9/5 | N/A | Cat Connect | | [V2Box - V2ray Client](https://marlvel.ai/apps/v2box-v2ray-client) | 4.6/5 | n/a | techlaim | | [avoVPN Desktop](https://marlvel.ai/apps/avovpn-desktop) | N/A/5 | N/A | Avocado VPN Technologies | | [Free VPN by Free VPN .org™](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) | 4.5/5 | Mixed | Free VPN LLC | | [Fusvob VPN : Super VPN 2026](https://marlvel.ai/apps/com-toplinkc-foxexcellent) | 4.5/5 | Mixed | Fuxin Technology | ## Company Profile - **Developer:** Sayuri Yamazaki - **Website:** [https://makosoyo.net/](https://makosoyo.net/) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/mahjong-score-calculator-sanma/id6740174129?uo=4) - **Dev Site:** [Official Website](https://makosoyo.net/) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.9/5 Rating - [*V2Box - V2ray Client*](https://marlvel.ai/apps/v2box-v2ray-client) (techlaim) · 4.6/5 Rating - [*avoVPN Desktop*](https://marlvel.ai/apps/avovpn-desktop) (Avocado VPN Technologies) · N/A Rating - [*Free VPN by Free VPN .org™*](https://marlvel.ai/apps/free-vpn-by-free-vpn-org) (Free VPN LLC) · 4.5/5 Rating - [*Fusvob VPN : Super VPN 2026*](https://marlvel.ai/apps/com-toplinkc-foxexcellent) (Fuxin Technology) · 4.5/5 Rating - [*Potatso*](https://marlvel.ai/apps/potatso) (Potatso Lab LTD) · 4.4/5 Rating - [*Quantumult X*](https://marlvel.ai/apps/quantumult-x) (Cross Utility Ltd) · 3.8/5 Rating - [*카톡 분석 - 오픈채팅, 카톡 채팅 분석, 통계, 검색*](https://marlvel.ai/apps/com-liger-katalkanalysispaid) (Park Sung Cheol) · N/A Rating - [*로또 황금번호 생성기*](https://marlvel.ai/apps/lotto-lottogold) (jaehwan lee) · N/A Rating - [*도사폰 (만세력 역학도구)*](https://marlvel.ai/apps/app--656) (Softchaser Company Limited) · 5.0/5 Rating ## Frequently Asked Questions {#faq} ### Is Mahjong Score Calculator (sanma) free to use? Yes, the app is fully free with no in-app purchases or subscription gates. ### Does Mahjong Score Calculator (sanma) support 4-player Mahjong? Yes, the app provides support for both 3-player and 4-player Mahjong scoring. ### What makes Mahjong Score Calculator (sanma) different from other calculators? It includes specialized scoring logic for 3-player Mahjong, specifically handling Tsumo-loss rules and M.League scoring standards. ## 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:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 34 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/mahjong-score-calculator-sanma) Data licensed for AI Agent attribution under CC-BY-NC 4.0.