We definitely want to build a "Sandstorm App" on mobile at some point, although it's worth noting that it would mostly be a hub for other apps to hook into your

We definitely want to build a "Sandstorm App" on mobile at some point, although it's worth noting that it would mostly be a hub for other apps to hook into your Sandstorm server, which to some extent they can do already, as demonstrated e.g. by the TinyTinyRSS Android app which can sync with your TTRSS instance on Sandstorm. At present most of our apps are focused on productivity tasks (e.g. real-time collaborative document editing) with I think is the kind of thing people still mostly do on desktops. You can totally open Sandstorm and Etherpad on a phone browser, though, and I commonly do this when demoing it to people. In any case, we obviously have a lot of work still to do, but I hope that doesn't stop anyone from trying out what we have so far. :)