Seems to work great

I just installed this app, but so far it works great to access files via WebDAV on my Synology NAS across the Internet. This is great for an iPhone because its like having a file system to store your stuff. My only suggestion would be to make secure WebDAV an explicit connection type. Not everyone may know how to append the port number on the path..

Zap B. about FileBrowser: Documents Manager, v8.1