Pregnancy app confusion

Amelie

Why does it say 5 weeks and 5 days , but when I click on the picture of a fetus it says week 6? It’s my first time being pregnant and using this app. I’m also using another app that says just six weeks. I’ve yet to have an ultrasound done. Could I have entered some of my info wrong? Is that why the app is unsure what week I’m on ?