Swirlicity is a fun particle drawing, swirling and twirling iPad app based on the physics of fluid dynamics. It doesn't just let you draw and then swirl particles - it also has an attract and repel modes, automatic wind toggle, and even lets you turn any image of yours into particles and manipulate that! All this is done to a beautiful, calming ambient background music.
You can also take screenshots - either tap the screen with two fingers at the same time, or press (and hold) the home button and then press the standby button at the top of your iPad.
Please note that while several competing particle apps also came out recently, Swirlicity was developed completely independently from them. We decided to take a little bit more time to do additional testing and polishing, and have the app exactly as we imagined it. As a result were not the first to the market, but we believe we are the best. :)