Not quite. There are two different tuner algorithms, so stopping the strobe doesn't mean the cent/bar display will always be at exactly 0 cents.It will, only because there's no margin for error built in...so unless your a is exactly 440 and not 440.001 etc...it will continue to strobe, even slowly.
https://forum.fractalaudio.com/threads/which-tuner-is-right.150396/post-1787988