Can’t use the app – Notefile Review

When I opened the app it blank out for a while and then jumped out of the app. Even after I removed the app from memory and restart the iPhone and back I still can’t open the app properly. I feel like the app has too much data and needs to be unload a little. But I wish I can safely remove the data not just brutally uninstall it. Is there a way for it? Also before I had the problem that when I wanted to search on a keyword., the app also crashed . After I removed a lot of the data then I can search again. Looks like I can’t save too much data in it . I wish there is an warning sign for it .
Review by ed_cgk on Notefile.