When comparing QR Code Reader vs Q QR Code, the Slant community recommends QR Code Reader for most people. In the question“What are the best QR and bar code scanners for Android?” QR Code Reader is ranked 2nd while Q QR Code is ranked 6th. The most important reason people chose QR Code Reader is:
This is a free app with no ads.
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Pros
Pro Free and no ads
This is a free app with no ads.
Pro Seamless scanning
Just point the camera at what you need to scan, and it's done. No need to take a picture, or press any extra buttons. If the QR code contains a URL or a text file, it will be opened automatically. For contact info, like emails and phone numbers, you will be prompted to choose the right action.
Pro Great for scanning product barcodes
QR Code reader recognizes most popular barcode formats, including UPC, EAN, and ISBN. It will show you the price of the product, online reviews, and other info it can gather.
Pro Recognizes many formats of QR labels
This app easily handles different QR formats, including encoded website URLs, email addresses, phone numbers, SMS, and product bar codes.
Pro Insanely fast
Pro Can read from a screen with low framerate
Cons
Con Collects a lot of private data
This app requires a lot of permissions to run: your location, photos and other media, Wi-Fi connection.
Con Requires newer phones to scan barcodes
To be able to scan a barcode, you need a smartphone with a good camera resolution.
Con It won't read Data Matrix or Aztec codes
Which are fairly common.