AI SaaS · Built solo, live at proux.designAgents do the research. Every answer cites its source.Every answer cites its source, across 350+ UX principlesTry ProUX (opens in a new tab)The engineIt decidesEvery sourceThe auditProUX vs general LLMsNot a chatbot. You set a task and ProUX runs it.Experts with curated skillsEach expert works from its own skill fileYour project contextGoals, users and rules, read on every taskGuideline libraryVerified UX guidelines, retrieved by RAGYour screenMeasured from pixels, not describedThe ProUX methodThe steps every task runs throughProUX engineThe right expertAutoChosen for the question, with its curated skillsThe right modelAutoPicked for the job, yours to overruleInformed design decisionsEach one cited, with the reasoning behind itYour product gets the same engine. Your rules, your data, decisions it can defend.The ProUX engine reads 5 sources:Experts with curated skills.Your project context.Guideline library.Your screen.The ProUX method.It returns the right expert, the right model and cited design decisions.You set the task. It picks the expert and the model.Every choice named on screenOne click changes itProduct page reviewAudit this product page. Buyers drop before Add to cart. What do I fix first?product-page.pngProUX decidedExpertDesign auditYou asked for an auditChangeModelAuto · Sonnet 5Deep, picked by the jobChangeGrounding3 project documentsYour project firstThen it runsAnalysing the designSearching ProUX guidelinesMapping findings16 guideline sourcesThe task: Audit this product page. Buyers drop before Add to cart. What do I fix first?Expert: Design audit. You asked for an audit.Model: Auto · Sonnet 5. Deep, picked by the job.Grounding: 3 project documents. Your project first.Then it runs: Analysing the design, Searching ProUX guidelines, Mapping findings.It used 16 guideline sources.Every claim links to its source.1 tap opens the guideline and its evidenceWhen no source covers it, it says soThinking partner · AutoDarken the price text. It measures 2.43:1 against 4.5:1. S1The Invisible Conversion Killer: Text Legibility in eCommerceGuideline #411Why it applies, real examples, and how to check it on your page.Click to open in side panel ↗Collapse long specs, so Add to cart stays in view. S2Assumption: no project document says who buys.Thinking partner · Auto · 2 sourcesGrounded in 3 documentsDarken the price text: it measures 2.43:1 against 4.5:1.Source 1: guideline 411, text legibility in eCommerce.Collapse long specs, so Add to cart stays in view.Source 2: guideline 32, collapse sections.Assumption: no project document says who buys.It measures the screen. It does not guess.Linen overshirtAED 189Add to cartBreathable linen, cut for warm days.123Measured from the pixels1Price text2.43:1needs 4.5:12Add to cart36ptneeds 44pt3Body text16pxpasses43 elements readAt risk · before the fixes100 − 24 − 8 − 4 = 64Critical 3Important 2Nice-to-have 2Fixes pasted · measured againBefore2.43:1After5.20:1Price text: fixed. Now 5.20:1, above 4.5.Add to cart: fixed. Now 48pt, above 44.Score, 2 criticals fixed64 → 80ProUX measures a product page from its pixels.Price text: 2.43:1, needs 4.5:1.Add to cart: 36pt, needs 44pt.Body text: 16px, passes.The score is 64, at risk: 100 less 24, 8 and 4.Price text is fixed at 5.20:1. Add to cart is fixed at 48pt.With 2 criticals fixed, the score moves from 64 to 80.Same task. A different kind of result.A general LLM“Looks light”An adjective2.43:1 against 4.5:1Measured from pixels“Best practice”No linkGuideline #4111 tap away8 equal tipsNo orderRanked fixesEffort on eachA new answerEach timeSame rulesEvery pageStart overA new chatRe-measuredFixed. Now 5.20:1“Looks light”A general LLM · An adjective2.43:1 against 4.5:1ProUX · Measured from pixels“Best practice”A general LLM · No linkGuideline #411ProUX · 1 tap away8 equal tipsA general LLM · No orderRanked fixesProUX · Effort on eachA new answerA general LLM · Each timeSame rulesProUX · Every pageStart overA general LLM · A new chatRe-measuredProUX · Fixed. Now 5.20:1The same task, answered by a general LLM and by ProUX.LLM: “Looks light”. ProUX: 2.43:1 against 4.5:1, Measured from pixels.LLM: “Best practice”. ProUX: Guideline #411, 1 tap away.LLM: 8 equal tips. ProUX: Ranked fixes, Effort on each.LLM: A new answer. ProUX: Same rules, Every page.LLM: Start over. ProUX: Re-measured, Fixed. Now 5.20:1.