When do I actually ovulate?

Jasmine • Live, Love, Laugh 💕

Glow says I ovulated yesterday, which this is my first time using glow. Flow app is saying that I ovulate in 3 more days and I have been using flow for 2 months and last month it was right because I can feel when my egg release. And right now my Cm is getting more watery like I am going to ovulate and I’m getting the sharp pains. Which app is correct?