In my opinion, the iOS Files app provides a much nicer interface than the official Boxcryptor app. However, the Boxcryptor integration is a little buggy. When deleting a file, the app jumps back to the Boxcryptor root folder. The same happens when using the Files app’s integrated document scan feature (go to folder in Boxcryptor, tap and hold somewhere in the blank area, context appears). This is especially annoying when scanning many files to the same folder.