Accuracy of Glow?

Michele
I have been using Glow, as well as another app, and countdowntopregnancy.com online. I like that Glow seemed to take into account my BBT as it changed my ovulation date up by 3 days. None of my other apps did that. It may make a difference due to my BD days.  How accurate has Glow been for other people? According to glow I'm 6 DPO