Fitting process is more elaborate than the fitting calculators because it is personalized. You might be recorded on a camera for computer systems to capture your flaws, like if your left leg is bowed out when you pull up, or when your hip is rotated too much forward. It's not just about saddle height, but also saddle set back, which influence how much of your weight is distributed to the rear of the bike and the rotation of your hips which then affects how you pedal. You might find out things you didn't know before, like your right leg is longer than left or something like that.

If you're serious about track, then having your bike fitting should be your highest priority.