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Dev tools · April 17, 2026

UX/UI Principles

Catch AI design mistakes before your users do

What it does

Free AI-powered tools to validate designs against 168 research-backed UX principles. Cursor, v0, and Claude generate beautiful interfaces but silently break UX fundamentals — Hick's Law violations, cognitive overload, missing feedback loops. 5 free tools: AI Validator, UX Smell Detector, Flow Checklists, AI Prompts (600+), Parts Checklist. No signup needed. Principles Library ($29/yr) unlocks all 168 principles with examples and prompts. Backed by 2,098+ citations. EN/ES.

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    Hello. This year I dived into UI/UX area and at the same time I work as a web developer. I sincerely love making good UI. But at my full time job it's not always possible due to different reasons =\ So I've been posting random UI/UX staff on Twitter, then I made a free book that had 50 tips (posted it here as well). I decided to finish this year by collecting everything I learned and here it is: https://akcium.gumroad.com/l/ui-ux-tips. This time it's a paid one. But, you can check ~20 pages of it, just go to…

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