For me at least, a round watch face blends better, and it's harder to tell whether it is a smartwatch or not out of the corner of your eye without specifically

For me at least, a round watch face blends better, and it's harder to tell whether it is a smartwatch or not out of the corner of your eye without specifically checking the face of the watch. For square watches, I can pretty much tell it's a smartwatch, starting from the Pebble days.