When comparing Norton Snap QR Code Reader (IOS) vs Clam Xav (desktop), the Slant community recommends Clam Xav (desktop) for most people. In the question“What are the best antivirus/malware/adaware apps for ios?” Clam Xav (desktop) is ranked 2nd while Norton Snap QR Code Reader (IOS) is ranked 3rd. The most important reason people chose Clam Xav (desktop) is:
Does not slow down computer under normal use.
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Pros
Pro Totally free
There is no cost to this app and there are zero in-app-purchases. This is great for those that want to protect their device but do not want to spend funds on such a thing.
Pro Lean
Does not slow down computer under normal use.
Pro Realtime scanning engine
This feature is called ClamXav Sentry, and this is what really makes this application valuable, it is a real time scanner that monitors changes in files and directories. It does require some setup and configuration to have functioning properly. Ideally you want to include directories where files are downloaded into your system for ClamXav Sentry to monitor. Alternatively, you can make it monitor your whole home folder if you don't know what you're doing.
Pro Option to build/configure your own ClamAV engine
You can roll your own engine if you wish.
Pro Free customer support
Customer support does not cost anything other than a single purchase of the app itself.
Pro Frequent & free malware database updates
Frequent updates means the user is more protected from current attacks.
Pro No yearly subscription fees
Clam Xav has a one time cost of $29.95. There are no other fees associated with the app, since it is purchased, it is yours to use for as long a s you like.
Cons
Con Difficult to take photos of multiple QR codes
If there are multiple QR codes in the same vicinity the app does not give the user a choice on which one they are trying to capture, leading to the incorrect QR code being snapped.
Con Does not scan memory
There is no way to scan the memory of ones device with this app, leaving an avenue of attack since the app is not able to detect anything amiss in the memory itself.