How do people on instagram get their pictures to look like this without a filter?

[PROJECT X Alexis]

This kid on instagram takes insane pictures, but at the top of the pic it says normal. I don't understand, it obviously looks like it has been filtered and edited, I've seen this also with many other people, how do they do this? Are they editing the photos on another app then uploading them to instagram? Thanks!!

Photo: http://www.flickr.com/photos/72444828@N0...hotostream

[penguin_girl_33]

They are most likely editing them on another app then instagraming them to look more fancy, but it has definitely edited, you can tell by the clouds and lighting. hoped this helped!