Yesterday, Tweetbot received a small but necessary update. Now, another popular Twitter client for iOS has also received a new update. The app is none other than Twitterrific, and its new 5.1 update is nothing if not significant.

The latest update to Twitterrific, which was relaunched to much acclaim in December last year, brings several new features bundled with tons of new improvements.

First and foremost, Twitterrific 5.1 introduces “muffling,” its take on the muting feature that has long been available in Tweetbot.

Twitterrific’s muffling feature enables you to mute users, hashtags, and domains on your Twitter timeline. It lets you tap and hold on a user, hashtag, or domain to muffle the item. Similarly, it lets you tap and hold on any muffled item to un-muffle the item. Muffled items are synced across devices via iCloud.

Now, here’s where Twitterrific’s muffling differs substantially from Tweetbot’s muting. Instead of completely hiding all affected items from your timeline, as in Tweetbot, Twitterriffic just minimizes muffled tweets. You can tap on any muffled tweet to “peek” at it and tap on it again to close it.

Twitterrific 5.1 also adds support for three new image hosting services, namely, Img.ly, Mobypicture, and Twitpic. Further, it adds the Avenir font, which is exclusive to iOS 6.

If you can’t see the video embedded above, please click here.

Along with those new features, the following improvements are included in Twitterrific 5.1:

  • Faster load times when refreshing timelines
  • Improved scrolling speed, especially with tweets using inline previews
  • Markers now scroll when loading more to fill gaps
  • Send tweets, set favorites, etc. while offline: you’ll see an option to perform them later
  • Links in user profiles are now displayed correctly and can be tapped
  • Mobilizer & share buttons no longer wait for a page to load before appearing
  • Added timeline previews for Flickr photos
  • Flickr photos now display in a slideshow view
  • Lists are hidden in the sidebar if you don’t have any
  • Sidebar appearance is now themed to match the timeline
  • New tweet count is now shown when refreshing saved searches & lists
  • VoiceOver: Compose counter notifies you when nearing the character limit
  • New gesture: Drag downwards on photos or modal navigation bars to dismiss
  • New gesture: Tap & hold location icon in compose to use it for all tweets you send from that account
  • Saving links to Pocket now attaches the tweet attribution
  • Proxima Nova updated with alternate ‘a’ font character
  • Various other UI tweaks

Compatible with iPhone, iPod touch, and iPad running iOS 5.0 or later, Twitterrific 5.1 is available now in the App Store as a free update or as a new $2.99 download.

Note that Twitterrific’s pull-to-refresh animation featuring Ollie the bird has been slightly redesigned. Apparently, it has been altered so as to differentiate it from Ollie’s “brother from another mother,” Larry, which is Twitter‘s official logo.

But don’t worry. Twitterrific developer The Iconfactory promises that Ollie will return in … Octopushy.

Hmmm … Octopushy … OctoPUSHy!

That’s right: the much-requested push notification feature is finally coming to Twitterrific through its next update. The Iconfactory says as much in the above video, which demos the aforementioned new features in Twitterrific 5.1.