Ovulation dates 5 days apart?

Sarah

Hi everyone ☺️

I’m new to using the glow app - for the past few months I’ve been using Flo. Yesterday I downloaded the glow app and put in all the same symptoms/entries from the last three months as I had in the Flo app and somehow the ovulation dates are 5 days apart from each other?! Flo says the 11th and Glow says the 16th! Has anyone had this happen before?