"but make use of only information which you have accumulated by your own play. "

so technically using any hud sort of thing is cheating, since YOU did not accumulate the information through your own play, a program accumulated the information and calculated everything for you. In order for you to do it personally you would have to go through every single hand history and keep track of it yourself.

Of course, I know spoon does this already, just to fill the dead time while 18 tabling.