Do you ovulate while on the pill?

I've read so many articles that say yes you do and so many that say no you don't. Does anyone know? I've been on the pill for 9 years and don't ever miss a pill. The <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> says I'm ovulating but I'm confused if I really am. Can anyone help this confused girl out?!