--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Golfbook - Golf Rules" developer_entity: "JAEMIN LEE" bundle_id: "com.golfbook.ios" app_store_id: "6777308261" category: "Sports" primary_platform: "ios" primary_monetization: "Free" offline_capable: true market_region: "US" platforms: "iOS" app_last_updated: "2026-09-03" report_date: "2026-09-06" last_verified: "2026-09-06T00:00:00.000Z" report_version: "1.0.2" total_reviews: 0 confidence: "low" confidence_score: 0.25 data_age_days: 24 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["sports", "free", "mobile app", "app review", "app analysis", "golfers", "ranging", "beginners"] canonical_url: "https://marlvel.ai/apps/golfbook-golf-rules" license: "CC-BY-NC 4.0" content_version: "v2" --- # Golfbook - Golf Rules Intelligence Report ## TL;DR {#tldr} - **Category**: Sports · Free > **TL;DR:** Golfbook - Golf Rules is a sports app by JAEMIN LEE, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Golfbook - Golf Rules is a sports app by JAEMIN LEE. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Sports | | **Developer** | JAEMIN LEE | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.25/1.0) | | **Data Age** | 24d | ## Metadata & Market Performance - **Publisher:** JAEMIN LEE - **Category:** Sports - **Target Audience:** Golfers ranging from beginners learning the game to experienced players needing quick rule clarifications on the course. - **Platforms:** iOS - **Version Reviewed:** 1.0.2 - **Report Date:** 2026-09-06 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.25/1.0) - **App Store ID (iOS):** 6777308261 - **Bundle ID:** com.golfbook.ios - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-09-06 ## Executive Snapshot **What it is:** Golfbook - Golf Rules is a reference utility for American golfers, providing an offline penalty calculator and slang dictionary on iOS. **Why users hire it:** It removes the social friction of on-course rule disputes by providing immediate, plain-English procedural steps without requiring cellular connectivity. ## App DNA (Features & Intent) - **[Differentiator] Penalty Calculator:** Decision-tree tool providing stroke counts and procedural steps for common on-course situations. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] Offline Reference:** Full access to rules and slang dictionary without requiring cellular connectivity. * *User Intent:* Users want uninterrupted access without internet dependency. ## Market Position {#market-position} Golfbook - Golf Rules functions as a specialized utility in the Sports category, maintaining a 4+ content rating for broad accessibility. The lack of recent feature updates suggests a low-intensity market presence compared to high-frequency golf-tracking competitors. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all features - **Analysis:** Golfbook - Golf Rules is currently offered as a free utility with no visible subscription or IAP gates, prioritizing user acquisition over immediate monetization. ## SWOT Analysis {#swot} **Core Strengths:** - Offline-first architecture removes connectivity dependency - Plain-English translations lower entry barriers **Growth Levers:** - Social-sharing features could drive installs - International slang localization could expand reach ## Recent Changes (v2 → v3) {#recent-changes} The product roadmap shifted from a focus on GPS-based utility to social-sharing features to address stagnant organic growth. This pivot marks a transition from passive maintenance to an active attempt to build viral loops. **Overall trend**: Mixed **Compared at**: 2026-09-06 ### High-impact changes - **[Added] Social-sharing roadmap** (features) ### Medium-impact changes - **[Added] New SWOT items** (swot) - **[Shifted] Market presence assessment** (positioning) ## What's New - **Latest (v1.0.2, 3 days ago):** Updated the privacy policy link. ## App Momentum (Maintenance) {#momentum} - Ships maintenance-only updates. - No new features added recently. > **Cadence:** 2 total versions · 0 majors in last 6 months · 3 days since last update · 84 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Golfbook - Golf Rules is a sports app that is completely free. > **Bottom Line:** Golfbook - Golf Rules provides a clear utility for on-course disputes, but its maintenance-only state leaves it vulnerable to feature-rich competitors. Adding a social-sharing loop would unlock organic growth and defend the user base against broader golf-tracking apps. **Best for:** Golfers ranging from beginners learning the game to experienced players needing quick rule clarifications on the course. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship a 'Rule of the Day' social-sharing feature because the current utility lacks a viral loop → increase organic install velocity ### Outlook: Stable The market for golf utilities is shifting toward all-in-one platforms that combine GPS, scoring, and rules. Golfbook - Golf Rules remains stable as a niche utility, but its lack of active development means it will likely lose share if a major tracking app integrates a similar penalty calculator. - ⚪ The maintenance-only release cadence indicates a stable, low-cost utility model rather than an aggressive growth play. - 🔴 The absence of new features in the last three months leaves the app exposed to feature-rich competitors bundling rule references. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Mixed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Golfbook - Golf Rules** (this app) | N/A/5 | N/A | JAEMIN LEE | | [DraftKings Predictions](https://marlvel.ai/apps/draftkings-predictions) | 4.8/5 | Mixed | DraftKings | | [DraftKings: Sports & Casino](https://marlvel.ai/apps/draftkings-sportsbook-casino) | 4.8/5 | n/a | DraftKings | | [FanDuel Predicts](https://marlvel.ai/apps/fanduel-predicts) | 4.8/5 | n/a | FanDuel, Inc. | | [Fish AI - AI Fishing App](https://marlvel.ai/apps/com-fishai-app) | 4.8/5 | n/a | GymBros Inc. | | [NBA: Live Games & Scores](https://marlvel.ai/apps/nba-live-games-scores) | 4.6/5 | Mixed | NBA MEDIA VENTURES, LLC | ## Company Profile - **Developer:** JAEMIN LEE - **Website:** [https://www.drendrendren.com](https://www.drendrendren.com) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/golfbook-golf-rules/id6777308261?uo=4) - **Dev Site:** [Official Website](https://www.drendrendren.com) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*DraftKings Predictions*](https://marlvel.ai/apps/draftkings-predictions) (DraftKings) · 4.8/5 Rating - [*DraftKings: Sports & Casino*](https://marlvel.ai/apps/draftkings-sportsbook-casino) (DraftKings) · 4.8/5 Rating - [*FanDuel Predicts*](https://marlvel.ai/apps/fanduel-predicts) (FanDuel, Inc.) · 4.8/5 Rating - [*Fish AI - AI Fishing App*](https://marlvel.ai/apps/com-fishai-app) (GymBros Inc.) · 4.8/5 Rating - [*NBA: Live Games & Scores*](https://marlvel.ai/apps/nba-live-games-scores) (NBA MEDIA VENTURES, LLC) · 4.6/5 Rating - [*PrizePicks - Sports Picks*](https://marlvel.ai/apps/prizepicks-sports-picks) (SidePrize, LLC) · 4.5/5 Rating - [*Sporttrade: Prediction Markets*](https://marlvel.ai/apps/sporttrade-prediction-markets) (SPORTTRADE INC) · 4.7/5 Rating | Positive Sentiment - [*플레이공*](https://marlvel.ai/apps/com-tychesoft-playball) (Tychesoft) · N/A Rating - [*더블이글 - 요즘 골프예약*](https://marlvel.ai/apps/com-albatrss-de) (Double Eagle Inc.) · 4.0/5 Rating - [*테니스타운*](https://marlvel.ai/apps/com-momzit-tennistown) (link.tennistown) · 3.5/5 Rating ## Frequently Asked Questions {#faq} ### Is Golfbook - Golf Rules free to use? Yes, Golfbook - Golf Rules is currently offered as a free utility with no subscription or in-app purchase gates. ### Does Golfbook - Golf Rules work without internet? Yes, the app is designed to work 100% offline, allowing access to the rules and penalty calculator on the course without cellular signal. ### How does Golfbook - Golf Rules compare to full golf-tracking apps? Golfbook - Golf Rules is a specialized, single-purpose utility for rule clarifications, whereas full golf-tracking apps typically include GPS, scorecards, and social features. ### What is a good alternative for golf GPS and tracking? Golfers looking for GPS tracking and scorecards should consider broader golf-utility apps, as Golfbook - Golf Rules focuses exclusively on rule references and terminology. ## 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:** 0.25/1.0 (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:** 24 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/golfbook-golf-rules) Data licensed for AI Agent attribution under CC-BY-NC 4.0.