Ovulation tests or no?

Stacey • 30. Happily married. 1 year old boy born 4/20/18
Just stopped my birth control last week. Husband and I will be TTC #1 and we are totally clueless! I've been using the app for a while now and I know it shows the days you are likely ovulating and what percentage likelihood you have of pregnancy, but should I count on this? It can't be perfectly accurate. Thoughts on investing in some ovulation tests?