Some remotes will work the the Z5500 and others will not.
Unfortunately there is no code available for the older XR11 remote.
Let me know if I can be of any further assistance.
It would be good if there was a code available, but for some reason Logitech have decided not to include one.
They can only include a limited number of codes, and will include what they think are the most popular.
The app is entirely different from a traditional remote, and the app can also be updated whilst the remote cannot.