Ive used Red Giants video effects software for years and couldnt resist an iPhone app. Plastic Bullet randomly generates an endless series of grunge looks for your pictures. If the look isnt your style then dont bother with the app. If it is a look you like, the main issue youll have is trying to save only a few variations.
For future versions of the app, id love to be able to save favorite presets, like Swanko Labs recipes. Even further down the line, the ability to select a generated image variation and be able to edit some of the effect parameters with sliders before saving would be fantastic. My Last wish would be a companion desktop application, similar to Look Suites Looks Builder, to use on full resolution images.
Until then Plastic Bullet is definitely an app worth having.
secedenyc about Plastic Bullet, v1.2