Is there a freeware, better FLOSS, online or preferably offline trainer for preflop probabilities. I imagine different play modes with entering percentages under measurement of time resulting in statistics on accuracy and time, or multiple choice.
I could just click on a probability table and do some "vocabulary learning", but a trainer as described has a much more convenient motivation and useful statistics imo.
I'm so specific about the modes because if there's none, I might take the time to program one myself.