Which should I go by?

So when I type my info in online it says I was ovulating the week of Christmas, but the <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> is telling me this week? We have been pretty active the past few weeks, especially during Christmas week, I checked my mucus and it seemed accurate. Which should I go by? I mean I guess I'll know in a couple weeks either way, but I'm so anxious!