Is glows ovulation days correct?

Tee💋 • Ttc bby #1 👶🏾 ❤️⭐️💘💜❤️🧡💛💚💙

So I’ve been using glow for about six months now. And am wondering if the ovulation day is correct. I typically have a 29-30 day cycle so I figure my big O days is between cycle day 16-18.