Android : Android kiosk mode app - running status bar

I've got a problem with status bar in kiosk mode App.

I want to know how to hide status bar and I know that is it possible to disable it permanently in 4.4.2 Kitkat? But I found nice app -KioWare.

There is cool mode when I grab status bar down, it is running back to the top very quickly. In 0.05 sec. I am not able to click anything. And this is what I'm looking for.

I can't buy this app because it's to expensive and I only need this magic trick with status bar. Anyone can help me ? It should be only few lines of code.