There is a great free VST autocorrect out there called GSNap, which has a subtle setting on it.
They also have Gtune, which is like a guitar tuner you can place in any channel. Really nice. And free.
https://www.kvraudio.com/product/gsnap-by-gvstor 64 and 32 bit
http://www.gvst.co.uk/gsnap.htmIf you have a slight pitchiness in your vocals, you can run it though the subtle setting and it will pretty much fix it, and it is not noticeable.
Work really great if you are "close" and just want to trim the edges.