Zenith means “the highest point in the heavens”. This is to say that at any point a person is, directly above them at the top of infinity is zenith.
Zenith is the title of a 2010 movie. I watched it once, and I would say that it is about as factual as The Matrix.It was pretty good, though. Instead of an age-old conspiracy thriller, they made something truly unique. It was released on BitTorrent, and it had an additional series of internet videos that helped continue the plot.
Apex is the topmost point of a given object. It is the tip of the iceberg, both figuratively and literally. To put both “zenith” and “apex” into a single idea is an intriguing and possibly humbling concept. I don’t mean anything by the title other than it sounds interesting.