I've disliked Instagram even before it hit Andriod so I've never seen how the app works. When you take the picture, does it upload automatically or do you have

I've disliked Instagram even before it hit Andriod so I've never seen how the app works. When you take the picture, does it upload automatically or do you have to actively share it? Because if it uploads automatically, then I think that is not good (for me anyway). If the crap filters (and previously being iOS only) weren't already keeping me away from Instagram, that feature surely would. But if you have to hit some sort of "share" button then you now have 2 steps which is not greatly more simple than what I do already without it. Since most of the Instagram pics that cross my stream have something written with them, I assumed there was a step after "take the picture". shrug to each their own though.