Seems my good one is a Diamond Crown, it always reads 64RH on my 65 RH heartfelt beads. So IMHO it's 1 point off at most, that's more than accurate enough. This turd crap one is off by 1 point now that I adjusted it a few times. Seems the temperature is off, guess you cannot adjust that. IMHO if I ever buy another hygro I'll go buy another baller one at $40+. Saves you huge hassle I never calibrated my nice one either. it's accurate and my sticks smoke great.
