The entire movie was shot on an iPhone 6S Plus, in 4K resolution.
In the closing credits, the book which Hank Eisenberg brought with him and is seen reading on the cruise is credited: "Out in the Open," courtesy of A.J. Truman.
In the closing credits, the book Hank Eisenberg picks out for Kurt Dimmeldorf to read is credited: "Deviant," courtesy of Justin Xavier.