Contains 19 types of WWI trench whistle Enjoy the realistic sounds of the WWI trench whistle! Create a trench whistle atmosphere anywhere with our app! It simulates the operation of a trench whistle with realistic sounds, creating the effect of a real trench whistle. Prank your friends and surprise them by creating the impression that you have a trench whistle The app contains 19 different trench whistle sounds How to play: - Choose one of 19 trench whistles. - Click on the trench whistle and listen to their sounds. Warning: the application is created for entertainment and does not cause any harm! The application does not have the functionality of a real trench whistle, but only imitates their sounds.