# Color Vision Plates — 14-plate colorblind screening > Color vision deficiency screening app using clinical methodologies. (iPhone/iPad app by LanguageCraft.) - Source: https://appshunter.io/ios/app/color-vision-plates/id6778625150 (this page in markdown: same URL + `.md`) - Developer: [LanguageCraft](https://appshunter.io/developer/1029635130) - Category: Utilities, Health & Fitness - Price: Free - Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 7 MB - Languages: American English - Released: 2026-06-15 - Data updated: 2026-08-03 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/color-vision-plates/id6778625150/reviews.md ## What is Color Vision Plates? I'm colorblind. Every "color blind test" app I tried was either a marketing funnel, an ad farm, or scientifically wrong. So I built the one I wanted: real methodology, sources cited, nothing to sign up for. Color Vision Plates is a 14-plate screening for red-green and blue-yellow color vision deficiency. It doesn't just say "you're colorblind." It attempts to classify the type: protan (red-weak), deutan (green-weak), or tritan (blue-yellow), using dedicated classifier plates that vanish for one type but not the other. HOW IT WORKS • Ishihara-style number plates and HRR-style shape plates (the two standard clinical methodologies, in use since 1917 and 1954) • Classifier plate colors generated by simulating dichromatic vision with the Brettel-Viénot-Mollon (1997) model and selecting pairs that survive one deficiency and disappear under the other • All plate colors defined in CIELAB with matched luminance, so hue is the only available cue: no brightness leaks to give the figure away • A display calibration check before the test starts, because a dimmed or Night-Shifted screen produces false positives • A control plate that catches display problems and flags the result as inconclusive instead of guessing • Plate order shuffles and dot patterns reroll on every retake, so you can't memorize an answer key WHAT YOU GET • A plain-English result ("Likely Green-Type Color Difference") with the clinical term alongside for your eye doctor • What the result might mean day-to-day: brake lights, status indicators, charts, ripe fruit • A plate-by-plate review of every answer • Screening history saved on your device, so you can retest over time and compare honestly • The methodology and full citations, one tap away, always THE HONEST PART This is a screening, not a medical diagnosis. Phone screens vary; clinical tests use calibrated printed plates under standardized lighting. The app says this everywhere (before the test, on your results, in your history) because a screening tool that oversells itself is worse than none. If your results suggest a color vision difference, see an eye care professional. PRIVACY No accounts. No tracking. No analytics. No ads. No network calls. The entire test is bundled with the app and runs offline. Your results stay on your device, and you can erase them anytime. THE SCIENCE Ishihara (1917); Hardy, Rand & Rittler (1954); Brettel, Viénot & Mollon (1997); Sharma, Wu & Dalal (2005) for CIEDE2000 color difference; Birch (2012) on prevalence. From the maker of What Color Is This?, the camera color-identifier built for colorblind people. About 1 in 12 men and 1 in 200 women have a color vision difference. Most found out by accident. This is a better way. Made by Luke Steuber. Published by Bridge City Lab LLC. ## Key features - 14-plate colorblind screening - Red-green and blue-yellow deficiency classification - Ishihara and HRR-style plates - Classifier plates for specific deficiency types - Display calibration check - Offline and ad-free operation - Screening history saved on device ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/color-vision-plates/id6778625150/reviews.md ### 5/5 — This is great *2026-06-16* Easy and actually fun to use — discovered a mild discrimination deficit I’d had no idea of… it makes sense though. Everybody should try it — I heartily endorse this app. ### 5/5 — Cool tool *2026-06-16* Good thing to check out your vision ## Frequently asked questions about Color Vision Plates ### Does Color Vision Plates have ads? No, Color Vision Plates is completely ad-free. The developer explicitly states 'No ads' and that the entire test runs offline without network calls. ### How much does Color Vision Plates cost? Color Vision Plates is free to download and use. The app is listed as 'Free' and does not have any in-app purchases. ### Is Color Vision Plates accurate? Color Vision Plates uses established clinical methodologies like Ishihara and HRR-style plates, with classifier plates designed to help classify deficiency types. However, it is a screening tool, not a medical diagnosis, and results can be affected by phone screen variations. ### Can I use Color Vision Plates offline? Yes, the entire test is bundled with the app and runs offline. There are no network calls, and no accounts or tracking are required. ### What devices does Color Vision Plates support? Color Vision Plates is available for iPhone and iPad devices. It is designed to run on these Apple mobile platforms. ### How often is Color Vision Plates updated? The latest version is 1.0.1, which was last updated on June 23, 2026. This indicates a recent update, suggesting ongoing support and potential for future improvements. ### What age rating does Color Vision Plates have? Color Vision Plates has an age rating of 4+. This means it is considered suitable for children aged 4 and above. ### What kind of color vision deficiencies does Color Vision Plates screen for? Color Vision Plates screens for red-green and blue-yellow color vision deficiency. It attempts to classify the type, such as protan (red-weak) or deutan (green-weak). ## Version history (last 4 releases) ### 1.0.3 — 2026-07-28 Color Vision Plates 1.0.3 is a quiet stability update. - Improves reliability when returning to the app after a screening. - Same 14-plate flow, same on-device history, same free offline screening. Questions: luke@lukesteuber.com. ### 1.0.2 — 2026-07-27 Color Vision Plates 1.0.2 is a small update for people who finish a screening. - After you complete a few screenings across separate sessions, the app may occasionally invite an App Store rating. Never on first open, never mid-plate. - Same 14-plate flow, same on-device history, same free offline screening. Questions: luke@lukesteuber.com. ### 1.0.1 — 2026-06-23 Now with colorblindness test plate clock widget! (it's evil, sorry) ### 1.0 — 2026-06-15 No release notes. ## More apps by LanguageCraft - [WordADay - A Minimalistic Word of The Day App](https://appshunter.io/ios/app/wordaday-a-minimalistic-word-of-the-day-app/id1029635131) - [What Color Is This](https://appshunter.io/ios/app/what-color-is-this/id6767490668) - [Idea Tiles](https://appshunter.io/ios/app/idea-tiles/id6767775306) - [Alt Text Intelligence](https://appshunter.io/ios/app/alt-text-intelligence/id6767936719) - [Skymarshal](https://appshunter.io/ios/app/skymarshal/id6768003674) - [Mandaza](https://appshunter.io/ios/app/mandaza/id6768237815) All apps by LanguageCraft: https://appshunter.io/developer/1029635130 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-03.*