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how to use QR code scanner app to scan or read the code?
Nowadays, you can find QR (quick-response) codes on everything. These odd-looking, black-and-white, pixelated designs were originally used by the automotive industry, but today they are most often found in magazines, newspapers, and ads.
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First, you need a QR-code scanner app and a smartphone or tablet equipped with a camera. iOS users should check out RedLaser. Android fans can try either Fast QR scanner or Free QR code reader. Both of these apps are free to download, and each one should handle any standard QR code just fine.