--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Jamzo" developer_entity: "Charles Robart" bundle_id: "com.charles.jamzo" app_store_id: "6753089065" category: "Sports" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-08-08" report_date: "2026-08-22" last_verified: "2026-08-22T00:00:00.000Z" report_version: "1.3.0" total_reviews: 0 confidence: "low" confidence_score: 0.05 data_age_days: 45 momentum_velocity: "maintenance" intelligence_version: 3 tags: ["sports", "free", "mobile app", "app review", "app analysis", "roller", "derby", "officials,"] canonical_url: "https://marlvel.ai/apps/jamzo" license: "CC-BY-NC 4.0" content_version: "v2" --- # Jamzo Intelligence Report ## TL;DR {#tldr} - **Category**: Sports · Free > **TL;DR:** Jamzo is a sports app by Charles Robart, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Jamzo is a sports app by Charles Robart. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Sports | | **Developer** | Charles Robart | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.05/1.0) | | **Data Age** | 45d | ## Metadata & Market Performance - **Publisher:** Charles Robart - **Category:** Sports - **Target Audience:** Roller derby officials, team staff, and scorekeepers requiring specialized timing and tracking tools. - **Platforms:** iOS - **Version Reviewed:** 1.3.0 - **Report Date:** 2026-08-22 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.05/1.0) - **App Store ID (iOS):** 6753089065 - **Bundle ID:** com.charles.jamzo - **Performance Trend:** Stable - **Data Window:** Analysis based on signals collected up to 2026-08-22 ## Executive Snapshot **What it is:** Jamzo is a roller derby game-management utility for officials and team staff on iOS. **Why users hire it:** It removes the coordination friction of manual paper-based tracking by enabling real-time, multi-device data entry during fast-paced games. ## App DNA (Features & Intent) - **[Differentiator] Lineup & Penalty Tracker:** Records skater participation per jam and tracks penalty box visits in real time. * *User Intent:* Users want visibility into their own performance and progress. - **[Differentiator] Dual-Device Synchronization:** Allows multiple operators to work on separate devices for simultaneous data entry. * *User Intent:* Users expect seamless access across multiple devices. - **[Standard] Multi-Purpose Timing Tools:** Provides dedicated timers for jams, intervals, periods, and penalty box durations. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} Jamzo occupies a specialized niche in the Sports category, currently maintaining a free-utility position with no IAP gates. The recent addition of lineup tracking in the latest release signals an effort to capture more of the game-day workflow. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all tools and features - **Analysis:** Jamzo is currently offered as a free utility with no visible subscription or IAP gates. ## SWOT Analysis {#swot} **Core Strengths:** - Dual-device synchronization removes manual coordination friction **Growth Levers:** - Standardizing tournament record-keeping via league-wide data export ## Recent Changes (v2 → v3) {#recent-changes} The analysis shifted from a general feature-tracking focus to identifying specific administrative and B2B growth barriers, specifically the 17+ content rating and the need for standardized tournament data export. **Overall trend**: Stable **Compared at**: 2026-08-22 ### High-impact changes - **[Added] Content Rating as Growth Barrier** (swot) - **[Added] Tournament Record-Keeping Opportunity** (swot) ### Medium-impact changes - **[Shifted] Strategic Focus** (positioning) ## What's New - **Latest (v1.3.0, 2 weeks ago):** Introduced a Lineup & Penalty Tracker to manage skater roles, track penalty box visits, and export game data. ## App Momentum (Maintenance) {#momentum} - Shipped lineup and penalty tracking system. - Maintains infrequent, feature-focused update cadence. > **Cadence:** 1 total versions · 1 majors in last 6 months · 14 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Jamzo is a sports app that is completely free. > **Bottom Line:** Jamzo provides essential utility for derby officials, but the current free-access model limits the developer's ability to scale. Establishing the app as a tournament-standard record-keeper would unlock B2B-style distribution into leagues, moving the product beyond a simple timing tool. **Best for:** Roller derby officials, team staff, and scorekeepers requiring specialized timing and tracking tools. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Audit 17+ content rating because it creates friction for school-affiliated leagues → increase potential user base ### Outlook: Stable The roller derby utility market remains fragmented, with most officials relying on manual tracking. Jamzo's ability to capture this market depends on its transition from a personal tool to a tournament-standard record-keeping system. - 🟢 The latest release introduced lineup and penalty tracking, indicating active development of core game-day workflows. - ⚪ The current free-access model lacks monetization, which may constrain future feature investment if the developer cannot capture league-level value. ## 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 | | :--- | :--- | :--- | :--- | | **Jamzo** (this app) | N/A/5 | N/A | Charles Robart | | [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) | 4.7/5 | n/a | GymBros Inc. | | [NBA: Live Games & Scores](https://marlvel.ai/apps/nba-live-games-scores) | 4.5/5 | Mixed | NBA MEDIA VENTURES, LLC | ## Company Profile - **Developer:** Charles Robart ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/jamzo/id6753089065?uo=4) - **Sources:** 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.) · 4.7/5 Rating - [*NBA: Live Games & Scores*](https://marlvel.ai/apps/nba-live-games-scores) (NBA MEDIA VENTURES, LLC) · 4.5/5 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 Jamzo suitable for official roller derby tournaments? Jamzo provides timing and penalty tracking tools that support game management, but users should verify if the export data format meets the specific record-keeping requirements of their governing league. ### Does Jamzo require an internet connection during games? Jamzo supports independent operation on separate devices, which is designed to function in game conditions where connectivity may be limited. ### What is the cost to use Jamzo's full feature set? Jamzo is currently offered as a free utility with no visible subscription or in-app purchase gates for its tools. ## 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:** 0.05/1.0 (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:** 45 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/jamzo) Data licensed for AI Agent attribution under CC-BY-NC 4.0.