Please help, ovulation question!!

Brittany • 28 years old, married 2016 -together 8yrs. Baby #1 08/17/19 Baby #2 on the way :)
 So I've been TTC for almost two months now, tracking my period and ovulation days with Glow and Clue. But I'm getting opposite results from each app. My period is the same in length on each app; recorded on the same days, but my ovulation days don't match up?! 
 Clue is saying that I'm ovulating the 28-3rd of this month, with ovulation day on the 2nd of July. Glow says my ovulation days are the 25-1st, with ovulation day on the 30th. I'm so confused. Any idea what I should follow? 

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