--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Color Blindness Test Ishihara" developer_entity: "Rina Katrina" bundle_id: "com.colorblind.ishiharatest" app_store_id: "1527379118" google_play_id: "com.ishihara.colorblind" category: "Medical" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2025-04-21" report_date: "2026-07-19" last_verified: "2026-07-19T00:00:00.000Z" report_version: "1.1.0" total_reviews: 1 overall_rating: 3 confidence: "low" confidence_score: 0.3 data_age_days: 28 momentum_velocity: "maintenance" intelligence_version: 6 nemesis: "Eye Test & Vision Checker" competitor_count: 6 tags: ["medical", "free", "mobile app", "app review", "app analysis", "individuals", "seeking", "personal"] canonical_url: "https://marlvel.ai/apps/color-blindness-test-ishihara" license: "CC-BY-NC 4.0" content_version: "v2" --- ## ⚠ Content Warning This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here. --- # Color Blindness Test Ishihara Intelligence Report ## TL;DR {#tldr} - **Category**: Medical · Free - **Signal**: Rating 3 > **TL;DR:** Color Blindness Test Ishihara is a medical app by Rina Katrina, rated 3/5 by 1 users, available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Color Blindness Test Ishihara is a medical app by Rina Katrina. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 3/5 (1 review) | | **Category** | Medical | | **Developer** | Rina Katrina | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 28d | ## Metadata & Market Performance - **Publisher:** Rina Katrina - **Category:** Medical - **Target Audience:** Individuals seeking personal color vision assessment and professionals requiring a screening tool for color blindness. - **Platforms:** iOS & Android - **Version Reviewed:** 1.1.0 - **Report Date:** 2026-07-19 - **Signal Count:** 8 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 1527379118 - **Bundle ID:** com.colorblind.ishiharatest - **Google Play ID:** com.ishihara.colorblind - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-07-19 ## Executive Snapshot **What it is:** Color Blindness Test Ishihara is a medical diagnostic app for iOS and Android that provides color vision screening using the Ishihara method. **Why users hire it:** Users hire this app for quick, low-friction color vision assessment without visiting a clinic, serving as a preliminary screening tool. ## App DNA (Features & Intent) - **[Standard] Ishihara Test Method:** Standardized color vision assessment using Ishihara plates to identify deficiency types and severity. - **[Differentiator] Professional Screening Mode:** Configured for clinical or professional use cases to assess color distinction capabilities. * *User Intent:* Users seek enhanced value through premium features. ## Market Position {#market-position} The app is a new entrant in the medical category, currently ranking in the top 100 free apps across several international markets. The lack of a grossing rank indicates the current free-only model fails to capture value from the professional screening segment. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all test features - **Analysis:** The app operates on a free-to-use model with no visible in-app purchases or subscription tiers. ## SWOT Analysis {#swot} **Core Strengths:** - Focused, lightweight UX specifically tailored for Ishihara-based color blindness screening **Growth Levers:** - Education partnerships or integration with professional screening workflows could provide a B2B distribution barrier ## Recent Changes (v5 → v6) {#recent-changes} The app's competitive positioning remains stagnant, with updates primarily reflecting new feature gaps identified against recent market entrants. **Overall trend**: Mixed **Compared at**: 2026-07-19 ### Medium-impact changes - **[Added] Web-based demo gap** (features) - **[Shifted] Weakness definition** (swot) - **[Shifted] Opportunity pivot** (swot) ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Color Blindness Test Ishihara vs Eye Test & Vision Checker - **[Eye Test & Vision Checker](https://marlvel.ai/apps/eye-test-vision-checker)** by Mobimartech SARL: This app is a direct nemesis because it dominates the vision-testing category with a massive user base and a feature set that encompasses both color blindness and general visual acuity. - **Key differences:** - Offers a comprehensive suite of vision improvement exercises beyond simple diagnostic testing - Maintains a massive install base and high review volume, creating a significant social proof barrier - Provides a multi-functional platform that addresses general eye health rather than just color deficiency ### Contenders (Strong Challengers) - **[Vision Check by Optikos Prime](https://marlvel.ai/apps/vision-check-by-optikos-prime)** by OptikosPrime ApS: This contender competes by positioning itself as a professional-grade, optician-gated screening tool that targets the high-accuracy segment of the vision market. - Integrates professional optician-gated protocols that elevate the app beyond simple consumer-grade testing - Focuses on precision measurement and remote screening capabilities for a more clinical user experience ### Peers (What They Do Better) - **[EyeQue PDCheck](https://marlvel.ai/apps/eyeque-pdcheck)** by EyeQue Corporation: This peer competes by offering specialized hardware-integrated vision tracking services that provide more utility than a simple software-only test. - Uses hardware-integrated measurement for pupillary distance, offering higher accuracy than screen-only tests - Provides a continuous vision tracking service that encourages long-term user engagement and data retention - **[Eye Chart Pro Remote Control](https://marlvel.ai/apps/eye-chart-pro-remote-control)** by Dok LLC: This peer competes by providing specialized utility for clinical environments, focusing on the hardware-software interface of vision testing. - Provides unique remote control functionality that bridges the gap between mobile devices and clinical displays - Targets professional medical workflows rather than the direct-to-consumer self-testing market ### New Kids on the Block (What's Innovative) - **[Color Blind Test - Ishihara](https://marlvel.ai/apps/color-blind-test-ishihara)** by Suman Sharma: This newcomer directly challenges this app's core value proposition by offering specific Ishihara plate testing and PDF reporting. - Includes a color blindness simulator and PDF reporting features that provide tangible value to users - **[vision.app](https://marlvel.ai/apps/vision-app)** by Capital Certainty SL: This newcomer is a threat due to its aggressive release cadence and focus on professional data integration. - Offers a web-based demo that lowers the friction for users to try the service immediately ## What's New - **Latest (v1.1.0, 1 years ago):** Updated test questions and improved test results alongside general performance enhancements. ## App Momentum (Maintenance) {#momentum} - Entered multiple international medical charts. - Maintains free-to-use diagnostic model. > **Cadence:** 2 total versions · 0 majors in last 6 months · 387 days since last update · 287 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} Color Blindness Test Ishihara is an established medical app that is completely free. With a 3/5 rating from 1 review, it shows polarized user reception. > **Bottom Line:** Color Blindness Test Ishihara provides a focused diagnostic tool, but its single-purpose design struggles against multi-functional incumbents, so the PM should prioritize adding professional reporting features to differentiate from broad-spectrum vision apps. **Best for:** Individuals seeking personal color vision assessment and professionals requiring a screening tool for color blindness. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Ship professional PDF reporting because it is a key differentiator for new entrants → increase professional user retention ### Feature Gaps vs Competitors - PDF reporting (available in Color Blind Test - Ishihara but absent here) ### Outlook: Mixed Market interest in mobile vision diagnostics is consolidating around apps that offer continuous tracking or clinical-grade reporting, leaving single-purpose Ishihara tools exposed to churn. The current lack of feature updates suggests a maintenance-mode posture, which will erode the app's visibility against rivals with more aggressive release cadences. - ⚪ New chart entries across international markets indicate initial discovery, but the lack of feature updates suggests a maintenance-mode posture that risks long-term churn. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 3/5 | | Total Reviews | 1 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 2 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Color Blindness Test Ishihara** (this app) | 3/5 | N/A | Rina Katrina | | [Color Blind Test - Ishihara](https://marlvel.ai/apps/color-blind-test-ishihara) | N/A/5 | N/A | Suman Sharma | | [Vision Check by Optikos Prime](https://marlvel.ai/apps/vision-check-by-optikos-prime) | 5.0/5 | N/A | OptikosPrime ApS | | [EyeQue PDCheck](https://marlvel.ai/apps/eyeque-pdcheck) | 3.7/5 | n/a | EyeQue Corporation | | [vision.app](https://marlvel.ai/apps/vision-app) | N/A/5 | N/A | Capital Certainty SL | | [Eye Chart Pro Remote Control](https://marlvel.ai/apps/eye-chart-pro-remote-control) | 3.0/5 | n/a | Dok LLC | ## Company Profile - **Developer:** Rina Katrina - **Website:** [https://genta-group.com](https://genta-group.com) - **Social:** [Instagram](https://www.instagram.com/ancora_themes) · [Facebook](https://www.facebook.com/AncoraThemes) · [X/Twitter](https://twitter.com/themes_ancora) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/color-blindness-test-ishihara/id1527379118?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.ishihara.colorblind&hl=en&gl=us) - **Dev Site:** [Official Website](https://genta-group.com) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*Color Blind Test - Ishihara*](https://marlvel.ai/apps/color-blind-test-ishihara) (Suman Sharma) · N/A Rating - [*Vision Check by Optikos Prime*](https://marlvel.ai/apps/vision-check-by-optikos-prime) (OptikosPrime ApS) · 5.0/5 Rating - [*EyeQue PDCheck*](https://marlvel.ai/apps/eyeque-pdcheck) (EyeQue Corporation) · 3.7/5 Rating - [*vision.app*](https://marlvel.ai/apps/vision-app) (Capital Certainty SL) · N/A Rating - [*Eye Chart Pro Remote Control*](https://marlvel.ai/apps/eye-chart-pro-remote-control) (Dok LLC) · 3.0/5 Rating - [*Eye Test & Vision Checker*](https://marlvel.ai/apps/eye-test-vision-checker) (Mobimartech SARL) · 4.1/5 Rating - [*필잇 - 약 알림 및 복용 기록*](https://marlvel.ai/apps/app--35) (Hansub Yoo) · N/A Rating - [*레어노트 - 암·희귀질환 정보*](https://marlvel.ai/apps/app--629) (LifeX, Inc.) · 5.0/5 Rating - [*창고형약국 약값체크*](https://marlvel.ai/apps/com-hiddenwave-yakcheck) (Lowkeybase) · N/A Rating - [*용인세브란스병원*](https://marlvel.ai/apps/com-severance-newys) (Yonsei University Health System) · 1.9/5 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:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 8 - **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:** 28 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/color-blindness-test-ishihara) Data licensed for AI Agent attribution under CC-BY-NC 4.0.