If you play online poker, this is one tool you can’t live without. There isn’t an online pro who doesn’t use PokerTracker. Version 4 tracks every hand of poker you play online (view their website for a list of supported poker sites). It lets you look at your statistics in unlimited categories, your win rates, trends, and more.

By using the “Heads-Up Display” (HUD) tool, you can even access information about your opponents while you are playing online poker! For example, if you’ve played hands against them in the past, you can instantly get information about their playing style. Most online poker sites allow this while playing, as long as you don’t pool or share this information online or with friends.

PokerTracker 4 costs $99, or $59 if you play micro-stakes only. Using the links on this page, you can get a 30-day free trial, with full access to all the powerful features.