Solver

Software that computes a near-equilibrium strategy for a defined situation — given the stacks, board and ranges, it returns which hands bet, call or fold and how often. PioSOLVER, GTO+ and similar tools made this routine study for serious players.

It only answers the question you asked. Its output depends entirely on the ranges and bet sizes you gave it, it assumes an opponent playing perfectly, and it cannot know that the player across the table folds too often. Mis-specified inputs produce confident, wrong answers.

Away from the table, yes — that is standard study. Consulting one while a hand is live is real-time assistance and banned by every major operator, with permanent bans and confiscated balances as the usual consequence.