When you open the Instagram APP you can look at your news feed where you can see that someone is now following you, likes or has commented on a certain photo.
When I look at the Instagram API (http://instagram.com/developer/) I can retrieve likes and comments when I request a certain media ID. However in order to know if someone has commented on a photo of mine I would need to scan all the photo's and request it's comments to check if any new comments have been made.
Does anyone know of a better way? Help is appreciated.
If it helps, content for "Following" tab is available at http://instagram.com/api/v1/news/, and "News" tab at http://instagram.com/api/v1/news/inbox/ (you need to be logged in to your account). All URLs point to internal instagram:// protocol so you would need to replace them when parsing and there seem to be no pagination options.