Need some Help!!!

Mika • 28 years young TTC our rainbow baby!! Can`t wait to receive the blessing from God.
My boyfriend and I are trying to conceive our first baby but he works out of town so that's makes it a little tricky. Does this app really work? I use this app and another website and they both tell me different days of my ovulation. Any tips or anything that work for you guys if you guys can share I would gladly appreciate it.