You don't need an account to watch what other players are streaming, but you do need to sign up in order to broadcast your own games. Once you have an account, you can also leave comments on other players' broadcasts, talk with other users on the app, and more.
One strength of Omlet Arcade is that you can filter broadcasts by game. So you can check out everyone streaming PUBG, for example. And if you don't have the game, you can download it with just a tap.
Omlet Arcade is an excellent app for streaming games on Android. Now you can share your own games as well as watch those of other players all around the world.