Milovana.com

have you thought about a simply tally counter?
http://flappity.com/online-tally-counter/

I apologize if the link was not helpful.. but I was not sure what exactly you asking
keep track of edges?? time between edges?? what exactly are you struggling to keep track of?

A couple of years ago I was able to download both a forward and reverse ladder tracker form the below sites:

forward ladder
<!-- saved from url=(0040)http://www.daregen.com/tools/Ladder.html -->

reverse ladder
<!-- saved from url=(0047)http://www.daregen.com/tools/ReverseLadder.html -->