Editors' note: This review was updated October 29, 2013, to cover the features added in the latest version.
Vine for iOS is a new social-networking app that revolves around making short 6-second video loops with sound and then sharing them with others. But once Instagram added 15-second video clips with filters in a recent update, Vine needed to differentiate itself to get people to stay onboard. This latest update will definitely help.
To get started with Vine, you can sign up with an e-mail and password directly with Vine or you can use your Twitter account for quick access. Once signed in, you'll see the Home feed that shows the latest videos from other users. A button in the upper-left corner lets you navigate among the home screen, a place to explore videos from other users, a personal activity section to view videos you've made, and a link to your profile. I recommend going to the profile screen right away to fill out your information and also to use the button in the upper right to search for other Vine users you know from your address book, Twitter, Facebook, or a direct search. With a few friends selected, the home screen will now show videos from your friends and other contacts.
The Home feed is the place to view the latest videos from people you follow, and as you swipe to scroll, you'll see you can do familiar actions letting you "like" a video, make comments, or revine a video (Vine's version of the retweet function). What's really neat about the Home feed is that as you scroll, each video starts playing automatically while you have it on screen, while scrolling to the next video automatically stops the previous one and starts the new one. This automatic setup makes for a seamless experience as you scroll through and look at user-made videos. In fact, it's one of the advantages Vine has over Instagram; without having to worry about photos in the feed, people can quickly watch video after video.
The Explore page is a great way to see how other people are using Vine. There are links at the top for popular videos and videos that are currently trending. There's also a list of Channels, so you can browse through videos by specific category, like Comedy, Cats, or Food. At the very bottom of the page, there's a useful grid of common hash tags, which is convenient.
Probably the best thing about Vine is the way you make your videos. From the home screen, you simply touch the camera button in the upper right, then touch anywhere on the screen to start recording. Just as with Instagram, the app only records while you're touching the screen, so you can record a very short clip, let go, then start recording again, and continue making clips until you reach your 6-second limit. But Vine is slightly better than Instagram when shooting video because you can touch anywhere on the screen, giving you a little more flexibility with your shots. Though the process seems simplistic at first, with the right timing as you cut to new scenes, you can create a really nice looping narrative -- even if it's only 6 seconds long.
On the viewfinder screen, there are also a number of advanced shooting tools that come in handy for creating more-polished videos. There's a tap-to-focus button, a grid (for maintaining level footage), and a ghost tool that helps you create seamless transitions by providing a semitransparent overlay of the last frame recorded. And, of course, there's a camera-switch button for going between front-facing and rear-facing cameras.