Due date debate

Mi

Does anyone have both the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> and <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a> app? I’m getting two different due dates, a week apart. I don’t have a 28 day cycle so I’m still not sure if I’ll have a Feb or March baby lol. Not sure if it’s too soon for an ultrasound either. Help please!