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RMP ratings on your registration page. 28 school adapters, save/compare plans, review snippets. ProfLens — Register Smarter. Every Semester. Stop guessing who to take. ProfLens pulls RateMyProfessors ratings directly onto your university's course registration page — live, inline, right next to every professor's name. No tab-switching. No copy-pasting. Just the information you need, the moment you need it. ⭐ Instant Inline Ratings Every instructor gets a badge showing their RMP rating, difficulty score, would-retake percentage, top student tags, and review count. Hover to read an actual student review — pulled live from RMP and shown without leaving the page. Tap the badge for a direct link to the full profile. Confident matches show immediately. Uncertain ones flag themselves with an amber badge and let you pick the right professor from a list — no more accidentally pulling data for the wrong "J. Smith." 🎯 Make Better Decisions — Right on the Registration Page ProfLens adds a toolbar to your registration page with everything you need to build a smarter schedule: Sort sections by professor rating (high to low, or low to high) Compare — highlight the best and worst section of each course side-by-side in one click Hide flagged — filter out sections below your rating threshold, above your difficulty threshold, or on your blocklist Cart summary — floating widget showing your current schedule's weighted average rating, your weakest professor, and any threshold or blocklist warnings 📋 Save Plans. Compare Them. Save up to 5 schedule snapshots and compare any two side-by-side in a diff table — course by course, professor by professor, with rating deltas. Perfect for deciding between a heavier schedule with better professors or a lighter one with more flexibility. Export any plan as a tab-separated clipboard copy, a downloadable CSV, or a JSON file. Or open a print-ready view with one click. ✅ Smarter Matching ProfLens scores every match for accuracy before showing you a badge. Low-confidence results (too few reviews to be reliable) show in gray so you know when to take a rating with a grain of salt. Uncertain matches let you manually pick the right professor and lock in the correct data. 📌 Favorites & Blocklist Mark professors you love or ones you'd never take again directly from the badge. Your lists sync across devices and follow you to every registration page. Sections with blocked professors are flagged in your toolbar summary and can be hidden with one click. 🏫 Works at 28 Universities — Plus Yours ProfLens ships with 28 built-in school adapters covering major universities including UCLA, UC Berkeley, UT Austin, Penn State, Michigan State, Georgia Tech, NYU, MIT, Stanford, Cornell, and more. Dynamic pages that load content after the initial render are handled automatically. If your school isn't on the list, you can add a custom adapter in Settings by pasting a simple JSON config — no coding required. ⚡ Fast, Even Offline Ratings are cached locally for 7 days. Repeat visits are instant, even after restarting your browser. Review snippets cache for 24 hours. One-tap refresh in settings when you want the latest data. 🌙 Light, Dark, or System Choose your theme in Settings. Badges adapt automatically to the registration page's background. 🔒 Private by Design ProfLens only ever contacts RateMyProfessors. No tracking. No analytics. No data collection of any kind. What you register for stays between you and your university. Getting Started Install ProfLens and set your school from the welcome screen Go to your registration page and click the ProfLens icon in your toolbar Toggle "Active on this site" — ratings appear instantly 30 seconds to set up. One less thing to regret next semester. Part of the Campus Stack suite — tools built for students, by students. Questions or feedback? We'd love to hear from you. What's New in 1.5 New Midnight Indigo design — refreshed badges, tooltip, and all extension pages New logo Schedule plans: save up to 5, compare any two side-by-side CSV and JSON export (in addition to clipboard TSV) Print view for your finalized schedule Cart summary widget: weighted avg rating, weakest professor, threshold warnings Difficulty threshold filter (hide sections that are too hard, not just low-rated) Secondary school support (cross-institution comparisons) Custom adapter import via JSON Security hardening: XSS fixes, sender validation, observer lifecycle fix Bug fix: uncertain match now correctly selects the right professor after cold install