📱 2025 Most Useful Free QR Code Scanner AppsQR codes are everywhere now—from cafes and concert halls to Naver logins and vaccine passes.We scan them to enter buildings, connect to Wi-Fi, transfer money, or open digital menus. But a bad app can ruin that experience.Among hundreds of QR apps, one app has over 10 million downloads and is used more often than any PC tool or default browser scanner...