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The watch face is called Gaze Effect: https://play.google.com/store/apps/details?id=info.fathom.watchfaces.gaze&hl=en
When you first select the face, there's only one eye looking at you, and then the eyes multiply with each time you look at the watch. Sometimes they'll look around, and sometimes they'll just stare at you. Every hour on the hour, their eyes synchronize ticking from side to side, eerily. Pretty fun.