We'll go into detail about the most useful free features how to take advantage of them.
With its search function Po F will help match you with people it believes you will like.
My favorite features were:1) Being able to see who viewed my profile and when2) Full access to all profiles3) Ability to see my history with a person when looking at their profile so I don't waste my time checking someone out I already have.
It's not totally necessary to find upgrade to the paid version if you want some success, but it sure does help.
Most of these are pretty straight forward except maybe the matching function.