OPK and Apps not matching up

Shelby • Mommy of 👶🏼 July 2016. Due with #2 👶🏼 October 2019

Hey ladies,

So have this app and Flo, and also have the Clearblue opk. I have yet to get an LH surge and have taken one for the past ten days. We’ve had sex every Green Day on my apps, one says a different day of ovulation than the other... what on earth?!