Ovulation PK Accuracy?!

Shonda • 1 year wedding anniversary April 7, 2014. Ttc baby #1 . Age 27 . This is just the beginning.
For those of you ladies who use opks, do you feel that your yes+ matches with the time of ovulation that your <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> says?