Virtual money gaming is something diffrent than
real money poker.
You can always calculate
odds, without calculator by multiply your outs by 4% on turn and 2,5% on river. Every card you need is an another out.
So when you're on a flush drop on a flop you have 9*4%=36% chance to get your flush.
It doesn't matter where you will calculate your odds, your score always depends on your decisions