I recently downloaded Hipstamatic onto my iPhone, after having heard people raving about how great it is. It’s an app that, when you take a photo with the phone, applies a crop and various filter effects to the image. You get to select the processing broadly by choosing what “film”, “lens” etc to use, but fundamentally you don’t really have any control of how the image will turn out other than what you point and shoot at.
I got quite into it, at first. I spent about half an hour pottering about, gleefully taking pictures. It was fun. The results were cool. I took the picture on the right. I thought “hmmm that’s quite interesting, quite cool, I’ve created a nice image there…”