What version of Sqlite does iOS include?
Just do:
p (const char*) sqlite3_libversion()
in a debugger running an app (that links to the sqlite lib) on a device on which you want to know the sqlite version.
On an iOS 8.0.2 iPhone 5s I get 3.7.13 so it seems they haven't changed version in a while based on reports in the other answers that version 6.0 used the same version.