Truth be told, I've long used the official Twitter app to read, manage, and post to my Twitter account when I'm out and about. The interface is super-clean, the functionality is equally vanilla, and the app just plain works. The tweets themselves take center stage, with the full width of my screen taken up with each 140-character-or-less missive.
For many power-users with multiple accounts and bigger content-generation needs, however, TweetCaster is a necessary upgrade. Whether in its free, ad-supported iteration, or its $4.99 ad-free Pro version, TweetCaster stands alone in the feature-rich category of Twitter clients.
First up is multiple-account support. If you're a social media professional, you no doubt have several Twitter feeds in need of monitoring, posting, and following. TweetCaster makes it easy to set up the accounts in a single place. There are also a number of themes available to skin the app to your liking, and when posting tweets a host of integrated tools are just a finger-press away: geotagging, URL shortening, attaching a picture, and simultaneous posting to Twitter and Facebook.
The most unusual feature of the app comes into play when viewing tweets. Each is displayed as a color-coded speech bubble. Your tweets appear in green, while any mentions of your account show up in pink. This makes sorting through your masses of tweets a bit easier, but the bubbles themselves take up enough screen real estate to make each entry that much less likely to fit in the allotted space.
Also available is the ability to set up and review Twitter trends, custom lists and saved searches. If you're like me, and you commonly search for one or two keywords, saving these common terms is a godsend.
The icing on the cake? You can click a button to see all nearby Twitter traffic in real time, based on your exact location (or an entered ZIP Code). This is particularly useful on a trade show floor, at an outdoor event or even during times of crisis.