the best c-bet size to use on the flop.
the best hands for bluff catching on the river.the best hands for semi-bluffs on the turn.It was released in 2015 and got a significant update in 2021. It is a popular GTO solver that operates postflop spots with arbitrary starting ranges, stack sizes, bet sizes, and chosen accuracy. PioSOLVER is one of the most popular GTO poker solvers on the market. Popular poker streamers use solvers for reviewing hands in their broadcasts, and famous live poker players discuss hands played on WSOP operating with GTO solvers' advice.
If 2-3 years ago, you could hear about them mainly from some professional poker players, now semi-professional or even recreational players use them periodically. GTO poker solvers are one of the most popular poker software nowadays.