For a couple of bucks you get an app that lets you churn out retro-looking photos from your iPhone. Orrrrrrrr you bring some analogue back in to the process with Holga's dope new iPhone case. It packs a rotary dial filled with nine plastic lenses and filters.
The effects range from simple tints, to cut out shapes, to multiple split images, to even close-ups with a 60mm macro lens. At $25 the simple slip-on case is admittedly a bit more expensive than digital alternatives like Instagram and Hipstamatic, but you're not going to get a more realistic cheap plastic filter effect than by using real cheap plastic filters. [Holga via BoingBoing]