There is not such a thing as a Twitter app that serves no purpose. Well, maybe the one that lets you tweet when you are in the bathroom comes close, but that can be deemed as the one exception that validates the rule.
The fact is that any app covers some gap in the way Twitter works, and points the way towards future official updates. The one under review right now plays a specific function, namely letting you turn your streams of tweets into a RSS feed. The one advantage this brings about is that of letting you save time, as you can access the information in a unified setting, and dispense with opening your Twitter client or the Twitter homepage. The latter case is rare, I know, but there must be people who tweet like that. Some newbies do for certain.
Using this tool is completely inexpensive. Al you must do is grant it access to your Twitter account. These links that are duplicate are consolidated, and that is a good thing if we bear in mind how popular retweeting has become.
I think the above gives you a good idea of what to expect from this site. You are either heading straight to it right now, or you are not getting near it at all.
Readtwit.com In Their Own Words
“Readtwit filters your twitter feed to links only, resolves link destinations and publishes the content as an RSS feed. You can then use any feed reading software / service to read twitter posted content along with the rest of your feeds.”
Why Readtwit.com It Might Be A Killer
It lets you kill two birds with the same stone.