Ovulation Testing vs. App

Hey ladies! I’m 32 and my husband and I have been ttc since December with no success. I started using this app shortly thereafter. Still no success. So I decided to use ovulation tests in conjunction with the app. The app says I should be ovulating today, but when I took the test this AM, it didn’t indicate that I would be ovulating within the next 24 hours. Is anyone else seeing discrepancies with the app vs. ovulation tests? Which should I trust? Just looking for some insight.