Fertility...

I'm on the pill (BC/ birth control).
And my question is, Being on the pill do you ever get fertile and / or ovulate?
Glow or <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> doesn't say.
And I bought First response and Clear Blue once and it was a waste of money. 😐