Forgot name of tool for theoretical measure of form interactions

A few years ago I used a tool that could theoretically measure the time to complete a form. The way it works is that you click on e.g. a screenshot, and mark what is a label, what is an input field, expected input etc. The tool would then calculate time spend on eye-movement (reading the label, identifying field etc), the time to move hand from mouse to keyboard, time to enter input etc.

I cannot find the tool anywhere, and I cannot remember what it was called.

Does anyone know the tool? Any help would be much appreciated.