All the features of WiFiAnalyzer can easily be accessed using the drop-down menu on the left-hand side of the screen. One of the most useful of these is the 'channel evaluator,' which provides you with a score of one to ten stars for each of the available channels. This way, you can quickly check which ones are the best. Another handy feature is the classic channel graph, which gives you a very intuitive graphical representation of all the surrounding channels.
WiFiAnalyzer is a fantastic app, which genuinely helps you to optimize your WiFi. That said, it's important to bear in mind that WiFiAnalyzer does NOT allow you to 'crack' WiFi network passwords or the like. This is simply an app for you to analyze nearby WiFi networks and select the best one.
Requires Android 4.1 or higher