What is the best website for iphone photography?

What is the best website for iphone photography?

If you mean an photo editing website, I think VSCO is the best one - it has tons of filters and editing techniques, plus tutorials. If you mean a website that you can use to take photos like a camera, I don't think that's a thing, I would just use your phone.

I think it could be better
http://pixelsatanexhibition.com/

I'd say Instagram.com and 500px.com.

Instagram was designed specifically for photos taken with smartphones. It's even designed so that you can't upload shots on your computer, IG will only accept photos uploaded from smartphones. A lot of people are getting around this restriction. They'll take the shot with the DSLR and once it's processed, they'll email it to themselves. Then all they need to do is open the email with their phone and then upload it to IG via their phones.

Probably the best website for high-end photography (regardless of what was used to take the image) is 500px.com.
500px.com is like flickr for professional and high-end artists. You can see this just by looking at the images that are uploaded to 500px.com. Almost all are extremely well done images as opposed to all of the snapshots that get uploaded to flickr.