Squatters video series Question

Hey guys I was watching the mastering section of the squatters series and he used a logic plugin that showed loudness and actual perceived loudness. Wondering if anyone knows of any other plugins that do this as I am currently using abelton?br
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Thanks for any replys.

Sonalksis freeg has a RMS meter. Think this is what mastering engineers look at for perceived volume.

Thanks Phil I will check it out