Have the administration ever thought about creating API for Numista?
It will allow the user to develop some third-party application, or just create some user-friendly mobile site. Because, in my opinion, current mobile version of the site looks awful.
For example, I daily use mobile version of my coins catalog (on my own site), when someone ask me if I do have some specific coin, or when someone ask me for coin swap. But since I started to manage my collection using Numista, it is not very easy to do.
You can start with some simple functions, like: getting the list of your own coins, searching the catalog.
And then later add some more functions.