Chick or Rooster? Solving the Mystery of Baby Bird Genders

Hello. I have 2 chicks that hatched August 3rd. I really suck at figuring out gender in younger birds. I know some people can tell by the shape of the feathers. To me, they all just look feather shaped lol not necessarily round or pointed. I have no idea what angles of pictures are needed so I just went in my backyard and took about a million of them. One has a purple band on. I tried labeling it in all the photos so you can tell which is which.