Ovulation tests????

Hello so I am just beginning TTC and I want to get some opinions and information on whether or not to do ovulation test and if so what are the best kinds that you guys use and what are your experiences from using them so far I want to do this because I have been using a <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period app</a> to track ovulation but whenever my period comes the date changes in the app so therefore I have not been having any sex on the day that I ovulate