Premom vs glow app......Help!

So I use both premom and <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a>, premom says I’m 2 days late and glow says I’m due on in 2 days. I track ovulation on premom more than glow. But who to believe 🤷‍♀️