Tap Tap Tuba Prank Pro

Forget what I said earlier, would you kindly.
Actually, this app doesn't do much. It has two green buttons that make tuba sounds – and that’s all.

Really.
Ain’t joking.

And this thing’s annoying as hell – well, that’s the reason why it was made. To IRRITATE people. Honestly, I couldn’t help writing this word with big letters. Just try to follow someone (I hope, you’d choose your friends at least for the first attempt) tapping the buttons every time they make a step, prove me right and enjoy their anger.
Great stress relief, right?
For even more fun choose someone who can't come up with you. Hint: they usually have food issues.