Best ovulation tests? Help!?!?

Destiny • I`m destiny, my so and I have had two miscarriages and then 1 chemical pregnancy/mc I have a beautiful healthy 4.5year old. My wife and I are trying for baby number 2.
I have wondfo but I'm not sure if it's sensitive enough for me, have never gotten a darker test line and I took digital last month to check, wondfo was never positive but digital was. We all know how expensive digital is, so I prefer not to count on them the whole month. Any ideas ladies?