Ultrasonic Sound Generator is a free Android app developed by SennikSoft under the Utilities & Tools category. The app allows users to turn their device into an ultrasonic sound emitter to repel humans or prank them. With adjustable power levels, users can increase the ultrasonic sounds to an unpleasant level and have fun with their friends. It is important to note that the app should only be used responsibly and for entertainment purposes.

The app is easy to use and has a simple interface. Upon opening the app, users are greeted with a screen displaying the power level and a button to start the ultrasonic sound. Users can adjust the power level by swiping left or right on the screen. The app emits a high-pitched sound that is inaudible to most humans but can be uncomfortable for some. It is recommended to use the app at a low power level to avoid any harm or discomfort.