First of all, watch the video.
For details see the website.
The app works with a specialized hierarchical mix of natural and composite very effective sounds: 1. earthquake sub-sounds, 2. increasing frequency, 3. gunshots, 4. screams, 5. explosion, 6. electric spark discharge, 7. lions roar, 8. thunder, 9. lightning, 10. Storm sub-sounds and 11. some electronically designed sub-sounds.

So don't shout alone, just press the desired button!

It can be installed on all mobiles and does not need to be connected to the Internet to work. It is accompanied by continuous support of good function. The refund policy applies.