Ovulation cramps?

Becky

So today I have noticed a dull cramping in my left pelvic region. I use two <a href="https://play.google.com/store/apps/details?id=com.glow.android">fertility apps</a> and one says I’m in my fertile window and glow says I have 8 days till my fertile window. Just wondering if anyone else notices this when the ovulate? Thank you!