The app itself

I wish the app updated the measurements more often, I’m in my week 10 (or 11th week), there should be a 2cm growth in 7 days...but the app always says the baby is 3.1 cm. I suppose it will just jump to 5cm at the beginning of week 11... :-/

Btw, anyone owns The Day-by-day Pregnancy Book by DK? The content is exactly the same.....