Great App for serious cyclists!

I have been a cyclist for over 30 years and I have longed for something like this. Sure there are books with charts in them, but I carry my iPhone (and this gives me yet one more reason to keep my iPhone close-like I needed one) and it is great to have this information handy. It could be even better if there were some sort of chart for putting together a set of rear cogs and two or three chainrings so that I could see the whole package at one time. OK, really over the top; give us an option to build those charts for all of our bikes!

jung@heart about Bicycle Gear Calculator — Bike Gears