Heal-Check OPK - do they work?

Question

Has anyone use the Heal-Check ovulation strips from Amazon? I don’t know if they were a dud or if I just did not ovulation. I had ovulation symptoms (EWCM, bloating, etc) around Day 13 when I had my darkest test line.
Symptoms have diminished and tests are getting lighter again so it seems that I am out of my ovulation window. 
This is my first month tracking ovulation. In hindsight, I looked at the reviews for Heal-Check and they were not great. 
Thoughts?

Answer

If your looking for better tests that seem to look more sensitive but also Amazon based try easy@home I bout 25lh tests and 10 pregnancy tests together and they were 9.99 all together and that’s just for the first month of testing way more sensitive I feel like