Butterfly knife - prank play online

The application simulates butterfly knives in your phone.
When you click on the butterfly knife, it will begin to open.
If you release your finger, the butterfly knife will close beautifully.
In the main menu, you can enable sound effects, vibration.
You can show realistic butterfly knives to your friends right on your phone.
The application is a joke and does not have the functionality of real butterfly knives.