I have used both, tend to use the app on phone more though.
I upload photos in the app, they appear here, but 'chats' on the app don't appear anywhere here and vice versa. You can't search on the app, so the same threads appear over and over again. My app chat posts count yet app reviews don't.
Also, there are many ship and port reviews that appear on the app but appear to source from some other website like maybe an agency site or other. Users on the app ask questions of the OP but I suspect OP never sees them or is not aware of the app user posts.
Are there plans to better integrate the app and this website or other sources that feed into the app?