QR Code Reader for iPhone is free useful QRCode Reader app.

* Quick launch
This app can launch quickly.

* Save the scan history
This app can save scanning histories.

* Read an image
This app can scan the QR code from your photo image.

*
If the screen after the application start-up becomes the dark, proceeds [Privacy] -> [Camera] from [Settings app] that [QR Code] is set to [on].