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Free online Ishihara color blindness screening test in 13 languages. Instant severity result, downloadable PDF report, and an embeddable widget. No sign-up, no email. Screens for red-green color vision deficiency, not a medical diagnosis.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | ishiharatest.com | diffyn.com |
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| Company | Startup from Slovakia | — |
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In their own words, as submitted to SaaSHub.

IshiharaTest.com is a free, no-sign-up online Ishihara color blindness screening test. Based on the classic Ishihara plate method, it gives a fast, private indication of whether you may have a red-green color vision deficiency, along with a difficulty breakdown and a downloadable PDF report. It...
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing Ishihara Test and Diffyn.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
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Free color accessibility toolkit with color blindness simulators, WCAG contrast checker, and accessible palette generator for designers and developers.
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The Color Blind Test is an optical test that is designed to determine a person’s type of color blindness and identify whether or not they have a color deficiency.
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A digitalized color blind test for adults and kids. This tool provides accurate results as it follows all clinical procedures. Taking a test here will save you time and money as you do not need to visit a doctor.
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Check color contrast ratio and follow WCAG with ease.
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Free online visual field test to screen for blind spots and vision loss. Quick, easy, and accessible from any device.
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