How the grading works
Each spot names your seat, your stack and what happened before you. Pick raise, call or fold. Green is the chart's main play, yellow a play the chart mixes in, and red one it never makes. The answer then shows the chart's mix for that hand, such as raise 70%, fold 30%, with a link to the full chart.
A yellow answer is not a mistake in the usual sense. Solvers often split a hand between two actions, a , and either action is fine as long as you take each about as often as the chart does.
How to practice with it
Play the five spots before you look at any chart, and say to yourself why you chose each action before you click. When a hand comes back red, open its chart and look at the hands around it: a red answer is often a hand near the edge of the range, played one step too loose or too tight. Come back the next day and the spots change. Over a week that is 35 graded decisions, enough to see which seats give you trouble.
The squares at the end share your result without the cards, so friends can play the same five spots and compare. Nothing is saved between visits, so the set starts again if you reload.
What else is free
Everything that works on its own is open: GTO preflop charts for every seat at six stack depths, push/fold charts and a push/fold solver for short stacks, a glossary of over 200 terms with worked examples, and calculators for odds, equity, pot odds, outs and ICM. A two-minute lesson on pot odds shows how the full lessons work.
The full trainer
Members get 48 interactive lessons from beginner to pro, preflop drills that show the of every mistake, full hands against bots in cash games and tournaments, and level exams. Mistakes from the table come back as drills, so practice goes where you are weakest.
Sign-up is invite only while the app is tested. Play the daily set to see whether the grading suits you, and leave your email below for an invite.