BuzzCheck

BuzzCheck is a mobile app + web extension that helps buyers avoid counterfeit headphones and earbuds in secondhand marketplaces. You scan the box label/serial, capture a few required photos (hinges, grills, ports, case interior), and optionally run a 30‑second audio test that checks for common counterfeit tuning and codec behavior. The app returns a risk score, a checklist of red flags, and a “what to ask the seller” script. For sellers, it generates a shareable verification page that can be attached to listings to increase trust and close sales faster. This is not magic: it won’t guarantee authenticity without manufacturer data, but it can dramatically reduce obvious fakes and mismatched parts. Monetization: $4.99 per one-off verification, or $9.99/month for frequent buyers/resellers.