Poker trackers?

[Airharley]

If this has been posted before, could someone please point me in the right direction.

I know a lot of people on here use poker data base trackers, and I was wondering which ones are the best to use? I've used Sharkscope a few times, and now that I've started to take my game a little more seriously I plan to use them more often. I know Sharkscope has a fee if you use it more then 5 times a day, do others have fees? And if so which ones are the best? Also what other websites and programs should I look into?