Wrong dates for pregnancy

Toni • Wed, Apr 08 • I`m a 29yo trying with hubby for #1. Have been TTC for 1 and a half years. Diagnosed with PCOS.

I logged my dates the same as I did in any other app, but glow/<a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">nurture</a> has my pregnancy a week later than other sites and my dates would suggest... How can I change my LMP so it registers my pregnancy appropriately for its dates?