|Developer(s)||Twitter Inc. (Previously atebits LLC)|
|Initial release||November 19, 2008|
|Stable release||3.3.6 (iOS), 2.1.1 (Mac) / August 16, 2011(iOS), June 1, 2011 (Mac)|
|Operating system||iOS, Mac OS X|
Tweetie is a client for Twitter, the social networking website. There is a mobile version that runs on iPhone, iPod touch, and iPad, and a desktop version runs on Mac OS X Leopard, Snow Leopard and Lion (respectively 10.5, 10.6 and 10.7).
The program was originally named Tweetie, developed by atebits. Both its iOS and Mac versions were acquired by Twitter on April 9, 2010.
Similar applications include Seesmic, Twitterrific and TweetDeck. On the iPhone, it is the first application which introduces the "pull to refresh" feature. The Mac OS X version of Twitter had many of the same features as its portable sibling. It had a free ad-supported version. The iOS version cost $2.99. The Mac version cost $19.95. The beta of the Mac version was leaked to the popular torrent site Demonoid a week before the official release.
Acquisition by Twitter
On April 9, 2010, Twitter announced through a blog post that the company had acquired Tweetie. Twitter stated that the acquisition stemmed from the lack of an official, Twitter-branded mobile application. Tweetie was rebranded as "Twitter for iPhone" and released on May 17, 2010. The company's founding CEO, Loren Brichter, became part of Twitter's mobile division and helped launch the "Twitter for iPad" application. 
On January 6, 2011, Twitter announced through a blog post that the company had also acquired the desktop version of Tweetie, changing the name to "Twitter for Mac". "Twitter for Mac" was launched on the new Mac App Store the same day.
- "Twitter Blog: Twitter for iPhone". Blog.twitter.com. 2010-04-09. Retrieved 2010-06-06.
- "Twitter for iPhone, iPod touch, and iPad on the iTunes App Store". Itunes.apple.com. 2010-05-18. Retrieved 2010-06-06.
- Review at Daring Fireball by John Gruber
- Review at tweetcrunch (link dead per 28 Jan 2012)
- Review at Smoking Apples
- Developer's Site