What do you think on dates?

Lindsey

My last period was Feb 9. The cycle before that I had a chemical pregnancy. I found out I was pregnant again on March 4. I used fertility friend and glow. I am pretty positive I ovulated on the 22 of Feb. So my question is, why do both apps think I’m at a different stage in my pregnancy. I logged everything he exact same. Fertility Friend calculates me to be 6w+2d and Glow says I’m 7 weeks. I have been going off of FF. It makes more sense to me. But I just don’t understand why they give me different dates. I have an ultrasound on Thursday and will obviously know then for sure. Just wondering your thoughts. Thanks ladies!