Why your phone’s camera is secretly a barcode scanner Modern phones treat barcodes and QR codes as just another kind of visual information, so the same camera you use for photos can also read the ...

Scanning a QR code with your phone is a common request, and should be simple, right? But it's not always as obvious how to do it as it should be. Read on for straightforward, illustrated instructions ...

I manage a swim club during the summer and want to build a basic (web-based, database back-end) member check-in app. The membership cards haven't been printed yet for the season, and it wouldn't be ...