Developer Manton Reece of was not the first to be annoyed by this incongruity, but unlike the rest of us he did something about it. Earlier this year, Reece announced , a service that lets Twitter clients save and load the most recent tweet a user has read.

"I found myself using a few different Twitter apps across Mac, iPhone, and iPad," Reece told via e-mail. "I use my iPad all the time (usually with my own app, ), and there's a disconnect when switching over to the Mac or on the go with the iPhone, trying to remember what replies you've seen or where you left off in the main timeline. It seemed like we reached a point where many people wanted this, and someone just had to launch it and try to make it work."

But the service remained out of the hands of the average user until Tuesday, when The Iconfactory released Twitterrific 4.3 , , and and became the first multi-platform client to support Tweet Marker. Both Reece and The Iconfactory's Craig Hockenberry hope it will be just the beginning for the feature.

"I couldn't be more excited that Twitterrific is the launch app," said Reece. "Twitterrific has played an important role in the growth of Twitter since its original release on the Mac, and because it's available on all the platforms I use, the sync is useful right away. But more clients will be coming."