The feature called traffic light monitors browsers for malware, adware, phishing. This feature is found on only the top tier of anti virus software packages, a must for computer illiterate people.
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.
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.
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.
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.
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.
Being software for a Mac and PC you will need to connect your iOS device to a Mac/PC in order to get this to work, but when connected the software can search the iOS device for infected files.
This software is Mac and PC only and requires installation on a Mac/PC in order to be used, so is not a self contained system for an iOS device as extra hardware is needed on top of purchasing this app.
In order for the app to protect ones device the app has to remain open at all times. This may cause trouble if the OS shuts down the app due to low memory or if the user accidentally closes the app. It is also an issue as an always open app will be using RAM, something that might not be able to be spared and will use more battery than if it was not open.
There is no cost to this app or any in-app-purchases, it is completely free. This is great for those that want some security on their device but do not have the funds to put towards it.