What are some alternatives?
When comparing ConnectUpz and QR Scanner Online, you can also consider the following products
Barcode Scanner - Barcode Scanner for Android
QuickMark - QuickMark makes everything possible.
MKH Barcode Reader - This tool can be used to scan QR codes on your PC or tablet. Note: a webcam is required.
QR Droid - QR Droid Zapper
SecScanQR - The QR-Code Scanner/Generator that cares about your privacy
Scan QR Code Reader - Scan is the most straightforward QR Code scanner available for iPhone and Android.