Website or mobile application analysis tools help you to check the behaviour of your visitors. In graphical form, the data is structured to be understandable.
Google Analytics is the most famous tool because of its free and high performance. In spite of its complexity, it remains however indispensable on all websites or mobile applications.
There are many analysis tools for websites:
Free tools: Google Analytics, Eanalytics, Piwik, Open Web Analytics
Paid tools; Adobe Digital Marketing Suite, IBM Marketing Center, Etracker, NeuroBayes, AT Internet, Weborama, Piwik Analytics.