Ovulation help

I'm new to this.

Just suffered our second miscarriage. (Healthy child in between)

I want to try again, this time I want to try <a href="https://play.google.com/store/apps/details?id=com.glow.android">tracking ovulation</a>. I tried it briefly before but didn't get far.

Can someone advise the best (not expensive) tests to use and when to test (best time/how many times a day/from when)

TIA