--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Simple Mahjong Calculator" developer_entity: "Zhegang Xu" bundle_id: "io.ionic.mahjongCalculator" app_store_id: "6743121161" category: "Utilities" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-03-14" report_date: "2026-08-27" last_verified: "2026-08-27T00:00:00.000Z" report_version: "1.7" total_reviews: 1 overall_rating: 5 confidence: "low" confidence_score: 0.3 data_age_days: 35 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["utilities", "free", "mobile app", "app review", "app analysis", "casual", "mahjong", "players"] canonical_url: "https://marlvel.ai/apps/simple-mahjong-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- # Simple Mahjong Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Utilities · Free - **Signal**: Rating 5 > **TL;DR:** Simple Mahjong Calculator is a utilities app by Zhegang Xu, rated 5/5 by 1 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Simple Mahjong Calculator is a utilities app by Zhegang Xu. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (1 review) | | **Category** | Utilities | | **Developer** | Zhegang Xu | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 35d | ## Metadata & Market Performance - **Publisher:** Zhegang Xu - **Category:** Utilities - **Target Audience:** Casual mahjong players and professional club members requiring accurate, multi-round score tracking. - **Platforms:** iOS - **Version Reviewed:** 1.7 - **Report Date:** 2026-08-27 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6743121161 - **Bundle ID:** io.ionic.mahjongCalculator - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-27 ## Executive Snapshot **What it is:** Simple Mahjong Calculator is a scoring utility for 4-player mahjong games, available on iOS and Android. **Why users hire it:** The app removes the cognitive friction of manual score tracking and arithmetic validation during multi-round games, serving as a digital replacement for paper scorecards. ## App DNA (Features & Intent) - **[Differentiator] Zero-Sum Validation:** Automated verification ensures every round total equals zero, preventing settlement errors. - **[Differentiator] Multi-Language Support:** Interface localization across 14 languages enables international adoption. - **[Standard] Smart Scoring System:** Real-time accumulation of scores for multi-round tracking. * *User Intent:* Users expect intelligent, adaptive experiences that learn from their behavior. ## Market Position {#market-position} Simple Mahjong Calculator maintains a niche presence in the Utilities category, relying on its 14-language localization to differentiate from regional competitors. The current lack of updates (167 days since last store update) signals a maintenance-mode posture rather than a growth-oriented one. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** Simple Mahjong Calculator is offered as a free utility with no visible in-app purchases. ## SWOT Analysis {#swot} **Core Strengths:** - Zero-sum validation logic prevents manual settlement errors - 14-language localization enables broad international market reach **Growth Levers:** - Cloud-sync for game history would increase user switching costs ## What's New - **Latest (v1.7, 5 months ago):** Resolved a logic error. ## App Momentum (Maintenance) {#momentum} - Ships minor logic corrections only. - Maintains maintenance-mode release cadence. > **Cadence:** 1 total versions · 0 majors in last 6 months · 166 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Simple Mahjong Calculator is an utilities app that is completely free. It holds a 5/5 rating from 1 review. > **Bottom Line:** Simple Mahjong Calculator provides a functional, zero-sum scoring utility, but the lack of active development limits its ability to capture users seeking social or cloud-integrated features. Focusing on cloud-sync would address the primary limitation of local-only storage, which is a key differentiator for professional club users. **Best for:** Casual mahjong players and professional club members requiring accurate, multi-round score tracking. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship cloud-sync for game history because it is a key differentiator for professional club users → increase retention ### Outlook: Stable The mahjong utility market is consolidating around tools that offer more than just basic scoring, such as social sharing and cloud-based tournament history. Simple Mahjong Calculator remains stable but exposed, as the lack of active feature development makes it vulnerable to rivals that integrate social loops. - ⚪ The maintenance-only release cadence (167 days since last update) suggests the developer is prioritizing stability over new feature expansion. - 🟢 The zero-sum validation mechanism provides a core utility that remains relevant for offline mahjong tournaments and club play. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 1 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Stable | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Simple Mahjong Calculator** (this app) | 5/5 | N/A | Zhegang Xu | | [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:** Zhegang Xu - **Website:** [https://yorukaru.com/](https://yorukaru.com/) - **Social:** [Instagram](https://www.instagram.com/cat_draw_master) · [YouTube](https://youtu.be/HcMm1kAWbNc) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/simple-mahjong-calculator/id6743121161?uo=4) - **Dev Site:** [Official Website](https://yorukaru.com/) - **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 Simple Mahjong Calculator suitable for professional mahjong clubs? Yes, the app is designed for professional scoring and tournament tracking, featuring zero-sum validation to ensure accuracy during multi-round games. ### Does Simple Mahjong Calculator require an internet connection? The app is designed for offline use, allowing players to track scores during family gatherings or club games without needing connectivity. ### What languages does Simple Mahjong Calculator support? The app supports 14 languages, including Traditional Chinese, Simplified Chinese, English, Japanese, Korean, Spanish, French, and German. ## 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:** 35 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/simple-mahjong-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.