Zoom in iPhone 3G ?

[bargaincrazy09]

I have a iPhone 3G, see on the blog about the zooming feature, however when I go into Settings > General I don't see accessibility ?

 

[Jellotime91]

Yeah only 3GS and onward have accessibility.

 

[heyfeel]

Is there an app which allows to zoom on pictures taken by an iPhone 3g ?