Yep, only libc. And only for some popularly installed (after system install) programs. >We selected these apps from the official marketplaces for each OS: Goog

Yep, only libc. And only for some popularly installed (after system install) programs. >We selected these apps from the official marketplaces for each OS: Google Play (45 apps), Apple AppStore (10 apps), and Ubuntu Software Center (45 apps). We chose popular apps based on the number of installs, selecting apps across nine categories, .. So mostly GUI programs. Not to mention that probably all those "apps" call into libc eventually (even android ones). Only thing this made me think about is "why is this taken seriously here?".