What would be my best option to track ovulation with PCOS?

So since I have PCOS and doing the keto diet since my gynecologist wanted me too. I'm trying to figure out when my ovulation is and stuff since some women who has PCOS doesn't ovulate and some do.

I never have any egg white discharge,just dry discharge that dries on my panties and they say it's normal.

I have been looking at that Ava fertility bracelet,and I don't know if it works with PCOS,but I am looking for something that will help me find my ovulation if I'm even ovulating at all.

I have read ovulation test strips works,but Amazon has millions of different brands and I don't know which one is good. Is Natural Cycle app good to use for PCOS,and if not what is?

I know the apps are not accurate I don't guess,but I just want on the right track. My gynecologist offer me to get on birth control pills if I didn't won't to do the low carb keto diet,but there are so many horror stories about birth controls how it can cause this and that.