Created account, now iPhone crashes when syncing Notebook data

Created account, now iPhone crashes when syncing Notebook data

Hi! I made some notebooks with the Notebook app on my iPhone. Now I wanted to use this app on my macbook as well. So I created an account on my Macbook and on my iPhone. Now the Notebook app on my iPhone is syncing for over 1,5hr now already. Looks like it's not going to work..And when I restart the app or the phone he directly starts syncing again. Help....The info on the notebooks is really important and it would be terrible to loose it. When I open Notebook on the Macbook, it sees my notebooks, although I can not see the pictures, because my iPhone is syncing..Thanks in advance for your advise!