Alexa and its traffic estimate is unavailable.
A keylogger is a hardware or a software program that records every single keystroke on the target device. A keylogger hardware is rare it needs to be directly insterted to the target computer device, but a keylogger software is more common. It only needs to be installed on the target phone and then it will be able to collect all the typed data from the target phone. As a keylogger can collect any type of data entered on a device, you can also use it as a spy application to spy on or hack a mobile phone. So, a keylogger can help the hacker to steal someones Nimbuzz password as they enter it on their device.