iPhone 3GS became very funny toy camera.
You cannot set complicate setting but it is simply fun.
It’s relatively good price, $1.99.
You will get following photo effect.

- Vintage Green
- Vintage Warm
- Vintage Yellow
- Low Saturation
- High Saturation
- Toning Sepia
- Rich B&W
- High Contrast B&W

The effect will apply randomly. (Or you can choose some of them)

See my gallery, “iPhone meets the World”