I use for doing equity analysis vs hand ranges. Eye opening stuff shifting from putting an opponent on a specific hand vs a range of hands and the app makes this so easy to do. I especially like the Heat Map option, basically this lets you dig into the opponents range of hands to see the equity vs specific hands in the range to gauge how many hands in his range you may be ahead of. Great for helping with value betting decisions. The developer is super responsive to inquires as well. I emailed him a question and heard back within an hour, wasnt expecting that at all. So much more I could gush about...hands down the best poker calculator out there. If your serious about improving your game, this is the ticket.