It supports farting on demand, on time delay and using Text Messages or the web browser. ...Apparently it has it's own HTTP Web Server so you can just WiFi over to it and fart away.
The app also lets you do one other thing via Text Message, you can have the phone with BS Fart App installed on it call some other phone. ...This allows you to eavesdrop on your mark, so you can wait for the perfect moment before making the phone fart.
Oh yeah, and it has an iPhone like kinetic list interface. But it also works fine on none touch devices.
I'm unemployed, so please pay the reasonable $1.99 I'm asking for it. I wrote the app entirely in C#, so it requires the 3.5 framework.