Ovolution Date

Hyma

My <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> says that I am ovoluting on 9th of October...I tested with OPK today with borh clear blue advanced and first response...with clear blue i got a solid smiley. With first reponse my test line is not brighter than the other line....i am confused....any suggestions. Did u <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> ovolution date and your opk results some times doesnt match?

Should i just believe opk tests?