You just need To sign up and add your website details, You get an code that you have to embed on your website, and Here you can start tracking your user on your website.
Yes, UserSplit provides you freemium service of your very first website and you can avail
50 Unique users
30 Days Data Retention
Yes, UserSplit has the feauters to filter out your specification of an individual element For example: you need to monitor specifc region country, click on the reports> geographic> countries.