Is instagram App only works on iphone ?

[modar secret]

I don't have an iphone ... how can I use instagram ??

and does it edit photos that are already taken or just takes new photos ?

[Daniqua]

uhm instagram works for most androids, and ipods. I;m not sure about ipads.. but yea.

For instagram you basically take a photo, and then instagram has these effects, that make it look cooler. or more like high def and "classy"
and then you basically upload them onto your instagram page and people like the photos you post