Has anyone used the app flow and gotten more accurate predictions? Flow says I’m ovulating tomorrow CD13 and I recently downloaded glow because a friend recommended it for me and I added all the periods Iv had, and they predict I don’t ovulate tell CD17 also my cycles normally last 27-28 days every once and a while I’ll have a longer cycle. Flow is spot on with cycle prediction most of the time and glow is saying I am always having a 30 day cycle, when I don’t. Any input ladies ?