--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Chart Builder Graph Maker" developer_entity: "Keitaro Ohno" bundle_id: "jp.app.chartmaker" app_store_id: "6448167767" category: "Productivity" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2025-12-21" report_date: "2026-08-07" last_verified: "2026-08-07T00:00:00.000Z" report_version: "1.0.5" total_reviews: 119 overall_rating: 4.4 sentiment: "Mixed" sentiment_score: 45 confidence: "medium" confidence_score: 0.6 top_praise_theme: "Simple and uncomplicated interface allows users to create charts without needing technical guidance" top_complaint_theme: "Total loss of app functionality post-update leaves users unable to perform basic graphing tasks" review_sample_size: 7 total_review_count: 7 analyzed_review_count: 7 data_age_days: 54 momentum_velocity: "zombie" intelligence_version: 3 tags: ["productivity", "free", "mixed sentiment", "mobile app", "app review", "app analysis", "users", "requiring", "basic"] canonical_url: "https://marlvel.ai/apps/chart-builder-graph-maker" license: "CC-BY-NC 4.0" content_version: "v2" --- # Chart Builder Graph Maker Intelligence Report ## TL;DR {#tldr} - **Category**: Productivity · Free - **Signal**: Rating 4.39 · Sentiment Mixed - **Recent focus**: Total loss of app functionality post-update leaves users unable to perform basic graphing tasks (top complaint) · Simple and uncomplicated interface allows users to create charts without needing technical guidance (top praise) > **TL;DR:** Chart Builder Graph Maker is a productivity app by Keitaro Ohno, rated 4.39/5 by 119 users, with Mixed user sentiment (45/100), available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Chart Builder Graph Maker shows Mixed sentiment (4.39/5 from 119 reviews) - users praise simple and uncomplicated interface allows users to create charts without needing technical guidance but report issues with total loss of app functionality post-update leaves users unable to perform basic graphing tasks. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.39/5 (119 reviews) | | **User Mood** | Mixed | | **Category** | Productivity | | **Developer** | Keitaro Ohno | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Medium (0.6/1.0) | | **Data Age** | 54d | ## Metadata & Market Performance - **Publisher:** Keitaro Ohno - **Category:** Productivity - **Target Audience:** Users requiring basic data visualization tools for quick chart generation. - **Platforms:** iOS - **Version Reviewed:** 1.0.5 - **Report Date:** 2026-08-07 - **Signal Count:** 7 reviews analyzed - **Confidence:** Medium (0.6/1.0) - **App Store ID (iOS):** 6448167767 - **Bundle ID:** jp.app.chartmaker - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-07 ## Executive Snapshot **What it is:** Chart Builder Graph Maker is a productivity tool for creating line, bar, and pie charts on iOS. **Why users hire it:** Users hire the app for quick, low-friction data visualization that avoids the complexity of professional spreadsheet software. ## App DNA (Features & Intent) - **[Standard] Line Chart Creation:** Tool for plotting data points into linear visual representations. - **[Standard] Bar Chart Creation:** Tool for generating vertical or horizontal bar-based data visualizations. - **[Standard] Pie Chart Creation:** Tool for rendering proportional data segments into circular diagrams. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} The app maintains a 4.39-star rating across 119 reviews, but the seven-month update silence and recent reports of broken functionality suggest a declining market position. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is distributed as a free utility with no visible subscription or in-app purchase gates. ## 🟡 User Sentiment (Medium Confidence: 7 of 7 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.39/5 - **Platform Split:** iOS 4.4/5 (119 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **Simple and uncomplicated interface allows users to create charts without needing technical guidance** - **Versatile graphing options allow users to switch between pie, bar, and line chart formats** ### Top Complaints (Impact Areas) - **Total loss of app functionality post-update leaves users unable to perform basic graphing tasks** ## SWOT Analysis {#swot} **Core Strengths:** - Simple interface lowers entry barriers for non-technical users **Growth Levers:** - Implementing image export addresses primary user frustration ## Recent Changes (v2 → v3) {#recent-changes} The report identifies a hardening of the app's 'zombie' status, with the PM action plan shifting to prioritize image export as a critical survival requirement. **Overall trend**: Declining **Compared at**: 2026-08-07 ### High-impact changes - **[Added] New threat: Abandonment signal** (swot) - **[Shifted] Action item impact upgrade** (positioning) ### Medium-impact changes - **[Improved] Specific technical identification** (positioning) ## What's New - **Latest (v1.0.5, 7 months ago):** General UI improvements. ## App Momentum (Zombie) {#momentum} - Last major release seven months ago. - Latest update introduced critical UI regressions. > **Cadence:** 1 total versions · 0 majors in last 6 months · 228 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Chart Builder Graph Maker is a productivity app that is completely free. With a 4.39/5 rating from 119 reviews, it shows mixed user reception. > **Bottom Line:** Chart Builder Graph Maker provides a simple graphing utility, but the current broken state post-update and lack of export features make it a churn risk, so the PM must prioritize stability and data portability to retain the remaining user base. **Best for:** Users requiring basic data visualization tools for quick chart generation. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] Rebuild core UI button logic because the latest update broke basic graphing tasks → restore functional utility ### Outlook: Declining The market for simple graphing tools is consolidating around reliable, feature-complete utilities, leaving Chart Builder Graph Maker exposed due to its recent technical instability. Unless the developer addresses the broken UI and adds export functionality, the app will continue to lose its remaining user base to more active competitors. - 🔴 The seven-month update silence combined with reports of broken buttons suggests the app is in maintenance mode or abandoned, eroding user trust. - 🔴 Inability to export charts prevents professional use, which limits the app to casual, low-retention hobbyist tasks. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.39/5 | | Total Reviews | 119 | | Sentiment | Mixed (45/100) | | Confidence | Medium | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Chart Builder Graph Maker** (this app) | 4.39/5 | Mixed | Keitaro Ohno | | [Mitsu: AI Life Coach](https://marlvel.ai/apps/mitsu-ai-life-coach) | N/A/5 | N/A | C2 Insights | | [ChatGPT](https://marlvel.ai/apps/chatgpt) | 4.8/5 | n/a | OpenAI OpCo, LLC | | [Pattrn - Discipline Tracker](https://marlvel.ai/apps/pattrn-discipline-tracker) | 4.8/5 | Thrilled | Pedro Schott | | [한음달-한국인에게 꼭 맞는 음력달력, 캘린더](https://marlvel.ai/apps/app--103) | 4.6/5 | N/A | YunaSoft Inc. | | [바로메모 - 매일 바로 작성하는 메모장](https://marlvel.ai/apps/cswpd-memo) | N/A/5 | N/A | SuWon Choi | ## Company Profile - **Developer:** Keitaro Ohno - **Website:** [https://webproject-c279c.web.app](https://webproject-c279c.web.app) - **Social:** [Facebook](https://www.facebook.com/sharer/sharer.php?kid_directed_site=0) · [X/Twitter](https://twitter.com/intent) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/chart-builder-graph-maker/id6448167767?uo=4) - **Dev Site:** [Official Website](https://webproject-c279c.web.app) - **Sources:** Developer website content, About us / company information, App store metadata, User reviews. ## Related Intel Reports - [*Mitsu: AI Life Coach*](https://marlvel.ai/apps/mitsu-ai-life-coach) (C2 Insights) · N/A Rating - [*ChatGPT*](https://marlvel.ai/apps/chatgpt) (OpenAI OpCo, LLC) · 4.8/5 Rating - [*Pattrn - Discipline Tracker*](https://marlvel.ai/apps/pattrn-discipline-tracker) (Pedro Schott) · 4.8/5 Rating | Excellent Sentiment - [*한음달-한국인에게 꼭 맞는 음력달력, 캘린더*](https://marlvel.ai/apps/app--103) (YunaSoft Inc.) · 4.6/5 Rating - [*바로메모 - 매일 바로 작성하는 메모장*](https://marlvel.ai/apps/cswpd-memo) (SuWon Choi) · N/A Rating - [*근로장려금 알리미 - 신청, 기준, 금액계산 가이드*](https://marlvel.ai/apps/com-swing2app-v3-d83e9bb95c05347f59ad81dea3b925ebf) (SY Company) · 3.8/5 Rating - [*통화관리솔루션 (부평구청용)*](https://marlvel.ai/apps/byto-bupyeong) (BYTO) · N/A Rating - [*시외버스터미널 예매가이드 - 시간표*](https://marlvel.ai/apps/com-rewd-metopcrent) (Multisoft app) · 4.1/5 Rating - [*スマホやめるにゃ*](https://marlvel.ai/apps/hiroto-nosnszone-nosnszone) (HIROTO TSUTSUSHIMA) · N/A Rating - [*プレゼンテーションなど タイマー*](https://marlvel.ai/apps/app--366) (MAKOTO SASAKI) · N/A Rating ## 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:** 0.6/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 7 - **Data Sources:** user reviews, 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:** 54 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/chart-builder-graph-maker) Data licensed for AI Agent attribution under CC-BY-NC 4.0.