GradeGuard — Fake Review Detector & Knockoff Filter for Amazon

GradeGuard grades Amazon product reviews so you don't get fooled by the fake ones. Open a product page and GradeGuard analyzes the written reviews right in your browser: it scores each review for fake-review patterns, audits the reviewer accounts behind them, and shows an honest reviewer-only rating and an A–F trust grade next to the listed stars. WHAT YOU GET • A trust chip on every product page — grade and reviewer-only rating at a glance • A full report panel: reviewer rating vs. the listed stars, verdict counts (authentic / questionable / suspicious), product-level warnings, and the most trustworthy reviews • Warnings for the patterns that inflate ratings: review farms, star-only rating floods, unusually uniform praise, unverified-purchase gaps, copy-paste review rings, and more • Trust chips on search results, plus a toggleable knockoff filter that greys out or hides lookalike no-name brands (dim / hide / off) • Community grades (optional): products anyone already analyzed show their grade instantly — no waiting, no scanning HOW IT WORKS All review analysis runs 100% locally in your browser, inside your own Amazon session — like reading the reviews yourself, just much faster. No accounts, no tracking, no analytics. Community grades are strictly opt-in: a one-time screen on first run explains exactly what would be shared — anonymous product-level grade records (product ID, grade, ratings, warning flags), never review text, never anything about you — and nothing is transmitted unless you enable it. Decline and the extension never contacts our server. Full policy: https://reviewerguard.org/privacy WHY TRUST IT GradeGuard shows its work: every grade comes with the specific warnings and per-review reasons behind it, and the scoring engine is grounded in published research on deceptive reviews and review-farm behavior. Grades are heuristic estimates, not definitive judgments of any review, product, or seller. Not affiliated with, endorsed by, or sponsored by Amazon.