The Ollcollp for iPhone 4/4S

Deal from deal.com.sg: The Ollcollp for iPhone 4 / 4S - One Device, 3 Lenses, 3 Functions @ $69.90

It comes with a velvet pouch which acts as a cleaning cloth. 

Clips onto your phone, not quite user friendly cos need to cut off some part of the back screen protector.. plus, it can only be used w/o any casing on the phone

Normal Lens (1)

Fisheye Lens

Normal Lens (2)

Wide Angle Lens

Normal Lens (3)

Macro Lens

Not much difference for Wide Angle & Macro lens.. 

the only obvious one is the Fisheye Lens.

**screenshots grabbed from milkfrost.multiply.com