Twitter for iPhone 5.7 has been released, bringing with it improved photo sharing and a preview of what your media- and metadata-filled tweets will look like prior to you posting them, so you can get them juuust right. The Twitter timeline also gets a makeover, now being wider and easier to read throughout the app. You'll also now receive a notification whenever a friend of yours joins Twitter (we aren't sure how that one works,) alongside all the typical bug fixes and code optimizations. You can download Twitter for iPhone now.