Two due dates!!

Hend
Ok so according to my OB and another <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy app</a> my due date is 14/6/2016 but and currently 10w+5d but glow is giving me a different due date 19/6/2016 9w+6d. Which one should i go by im so confused.