Do you throw a real ball when play Pokemon GO?

No, you don't throw a real ball when playing Pokémon GO.

Pokémon GO is a mobile game that uses augmented reality (AR). You use your phone's camera to view your surroundings and then interact with Pokémon that appear virtually in those surroundings.

To catch Pokémon, you tap on the screen to throw a Poké Ball, which is simulated on your phone screen. The game doesn't require you to physically throw any object.