First off, we try really hard to call them services, not apps, since the later concept collides with the little icons on your phone and laptop and causes confusion. But that's a side point. To answer your question...No, I don't think there has been any huge surprise in terms of which services are most popular. By design, we actually don't/can't have any concrete figures about service usage because we have no insight into these devices. But in polling our customers, the result have been roughly in line with expectations. Most popular services are Bitcoin and Vaultwarden (password management), followed by Lightning (mostly LND over CLN) and File Browser (Dropbox alternative)