After several days' typing, I have found that WhatPulse only record keys on few positions such as my shift, control alt and capslock, it doesn't record my keys on the letter and number buttons.
My computer is MacBook Pro (Retina, 15-inch, Mid 2015), and my OS is Mac OS X 10.12.4
My computer is MacBook Pro (Retina, 15-inch, Mid 2015), and my OS is Mac OS X 10.12.4