I bought this camera lens kit for the heck of it, because it cost only $(removed) including shipping, via Amazon. The package arrived from China. The kit consists of three lenses (made of red anodized aluminum) and a spring-loaded clip. To use a lens, you screw it on the clip and then pinch the clip over phone's camera lens. The clip is padded so it won't scratch your phone. I had to take my phone case off for best results.
The macro lens is excellent for getting very close detail shots of small objects. The fish-eye and wide-angle lenses are similar to each other, but the fish-eye gives a more exaggerated bubble view. The kit also comes with lens caps and a little cloth drawstring pouch to keep all the pieces together.
Fisheye, Wide Angle, and Macro Camera Lenses
$(removed) Buy one on Amazon