I disagree (respectfully!) re plural views expressed. It seems to me that the plural is a great option if the app, for example, was going to be a clearing house for things like exchanges and host families. To me the singular would sound awkward for that. I realize it is arguable though. On Google search results the plural has just over 2 billion results and singular 3.6 billion, not that different.
ps I see that the sale already shows up on NameBio, so supposedly all complete.
pps The plural hosts in .com sold for $100,000 about a year ago