The same low-key enthusiasm pervades all of Twitterrific 5. Subtlety is the name of the game here. Per-tweet controls like reply, retweet, and favorite don't appear until you tap on a tweet. Indicators on the mentions and messages tabs are small colored triangles. The palette in general is fairly monochromatic, with the rare exception of highlight colors that really draw attention. Tweets you haven't read yet have their timestamps in purple, instead of gray. Above all, it's simple and not overwrought.
Twitterrific has long been heralded for its customization features, and version 5 offers quite a few of those. From the sidebar, tap on the change font size button (Aa) to summon a window with a number of display options, including changing the font face throughout the app (by default it's tried-and-true Helvetica, but four other options are also available), adjusting font size up and down, choosing from small or large avatar icons, and adjusting the spacing between lines of text. There's also a brightness slider, independent from iOS's own, and a choice between dark and light themes. In a nice touch, there's an option elsewhere in the app's settings to have Twitterrific automatically shift from dark to light themes based on time of the day.
Despite that customization, you won't find a laundry list of services for Twitterrific to interact with for uploading images and videos. You can choose a Sync Service to keep your Twitter timeline in the same position across devices: Twitterrific offers support for both iCloud, which allows syncing between the iPhone and iPad versions of the app, and Tweet Marker, which supports syncing across multiple clients, including Twitterrific for Mac. In addition, the app will detect if your device also has the Instapaper or Pocket apps installed, and provide options for bookmarking URLs to those services.
Gestures are on display here as well. Tapping and holding the profile picture in the top left will prompt you to change accounts, if you have more than one configured. Swiping left on a tweet will bring up a reply window to that message, while swiping right will show you the conversation thread or replies to that post. And when composing a tweet, you can tap the character counter to clear all text, and tap and hold on the camera icon to just attach the latest photo from your device's camera roll. In one bit of hocus-pocus that I'd never seen before, a two-finger swipe up or down in Twitterrific hides or reveals iOS's status bar. The Help section contains a list of all available gestures and where you can use them.