--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Riichi Mahjong Score Calc" developer_entity: "kotaro yamada" bundle_id: "jp.co.tool.mahjong-score" app_store_id: "6782329880" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-07-31" report_date: "2026-09-03" last_verified: "2026-09-03T00:00:00.000Z" report_version: "1.0.2" total_reviews: 0 confidence: "low" confidence_score: 0.2 data_age_days: 27 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "japanese", "riichi", "mahjong"] canonical_url: "https://marlvel.ai/apps/riichi-mahjong-score-calc" license: "CC-BY-NC 4.0" content_version: "v2" --- # Riichi Mahjong Score Calc Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free > **TL;DR:** Riichi Mahjong Score Calc is a utilities app by kotaro yamada, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Riichi Mahjong Score Calc is a utilities app by kotaro yamada. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Utilities | | **Developer** | kotaro yamada | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 27d | ## Metadata & Market Performance - **Publisher:** kotaro yamada - **Category:** Utilities - **Target Audience:** Japanese Riichi Mahjong players, from beginners learning the rules to club players needing quick score verification. - **Platforms:** iOS - **Version Reviewed:** 1.0.2 - **Report Date:** 2026-09-03 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6782329880 - **Bundle ID:** jp.co.tool.mahjong-score - **Performance Trend:** Improving - **Data Window:** Analysis based on signals collected up to 2026-09-03 ## Executive Snapshot **What it is:** Riichi Mahjong Score Calc is a scoring calculator and study tool for Japanese Riichi Mahjong players on iOS. **Why users hire it:** The app removes the cognitive friction of manual fu counting and scoring, which is the primary barrier for players moving from casual play to club-level competition. ## App DNA (Features & Intent) - **[Standard] Riichi Mahjong Score Calculator:** Calculates exact points and payment splits based on han, fu, dealer status, and win type. - **[Differentiator] Fu Breakdown Analysis:** Visualizes the calculation logic for fu counts including melds, pairs, and waits. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. - **[Differentiator] Beginner Study Guide:** Twenty-topic curriculum covering rules, scoring, and terminology. * *User Intent:* Users need clear guidance to understand and adopt the product quickly. ## Market Position {#market-position} Riichi Mahjong Score Calc occupies the utility segment of the Japanese Riichi Mahjong category, focusing on technical scoring verification rather than gameplay. The app maintains a maintenance-mode release cadence, with one major update in the last 34 days. ## Monetization Strategy - **Model:** Free - **Tiers:** Free to play with ads - **Analysis:** Ad-supported utility model with no paid tiers or subscriptions. ## SWOT Analysis {#swot} **Core Strengths:** - 20-topic study guide standardizes terminology for the international riichi community **Growth Levers:** - Localized ad-free upgrades could capture value from dedicated club-player segments ## Recent Changes (v2 → v3) {#recent-changes} The developer transitioned from a passive ad-only model to an active plan for a one-time ad-free upgrade to capture high-intent club player revenue. This shift in monetization strategy represents the primary change in the app's competitive outlook. **Overall trend**: Improving **Compared at**: 2026-09-03 ### High-impact changes - **[Shifted] Roadmap for Ad-Free Upgrade** (pricing) ### Medium-impact changes - **[Shifted] Contrarian Take Re-framing** (positioning) ## What's New - **Latest (v1.0.2, 1 months ago):** Localized the entire application into English, including the beginner guide, yaku list, and quizzes using standard riichi terminology. ## App Momentum (Maintenance) {#momentum} - Localized full English support. - Ships maintenance-mode updates. > **Cadence:** 1 total versions · 1 majors in last 6 months · 34 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Riichi Mahjong Score Calc is an utilities app that is completely free. > **Bottom Line:** Riichi Mahjong Score Calc defends its niche by prioritizing pedagogical depth over gameplay, but the lack of a paid tier leaves revenue potential on the table. Transitioning to a freemium model would unlock value from the dedicated club-player segment. **Best for:** Japanese Riichi Mahjong players, from beginners learning the rules to club players needing quick score verification. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Introduce a one-time ad-free upgrade because the current ad-supported model lacks a premium tier for power users → increase ARPU ### Outlook: Stable The market for specialized riichi utilities remains stable, with demand driven by the technical complexity of scoring rules. Riichi Mahjong Score Calc is well-positioned to serve the international community, provided it can maintain its pedagogical edge against general-purpose mahjong apps. - ⚪ The app maintains a maintenance-mode release cadence, focusing on stability and localization rather than aggressive feature expansion. - 🟢 Full English localization of the study guide expands the potential user base to international riichi players who previously lacked English-language resources. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Improving | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Riichi Mahjong Score Calc** (this app) | N/A/5 | N/A | kotaro yamada | | [Sota Connect: Secure Network](https://marlvel.ai/apps/fi-catconnect-sota) | 4.8/5 | 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:** kotaro yamada - **Website:** [https://main.d21odfgwc83uql.amplifyapp.com/apps](https://main.d21odfgwc83uql.amplifyapp.com/apps) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/riichi-mahjong-score-calc/id6782329880?uo=4) - **Dev Site:** [Official Website](https://main.d21odfgwc83uql.amplifyapp.com/apps) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*Sota Connect: Secure Network*](https://marlvel.ai/apps/fi-catconnect-sota) (Cat Connect) · 4.8/5 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 Riichi Mahjong Score Calc a game? No, it is a utility tool designed for scoring and study, not for playing mahjong. ### Does the app work without an internet connection? Yes, the app is designed to work fully offline, including the scoring table and study guides. ### What is the difference between this and a standard mahjong app? Standard mahjong apps focus on gameplay, whereas this app focuses on the technical rules, scoring calculations, and study materials for riichi mahjong. ## 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:** 0.2/1.0 (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:** 27 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/riichi-mahjong-score-calc) Data licensed for AI Agent attribution under CC-BY-NC 4.0.