Ovulation date

Alissa • 30yo - been with fiancé for 9 years 💍 TTC baby #1 since Sept 2014 ❤️ 1st cycle IVF w. ICSI: in process!
I wish we could change our ovulation date. I get ovulation cramps and possitive OPKs. I ovulated on 4/26 but the app thinks otherwise causing my charts to say I'm 13DPO when I'm really 16DPO. Wish we could change it.