Tweet Note's an app whose usage may not be immediately clear. It's seemingly designed to take 'notes' that you can share on Twitter, but even that seems vague still. No, what this really is is an app that's designed for live tweeting events. You put a search term (likely a hashtag) in the left column, and use the text entry on the right column to type out 'paragraphs' that you can tweet. The search column on the left automatically refreshes, so you can keep up with what other people are also tweeting about on the same topic as you log your own tweets on the event.
And really, an app for live tweeting is something that hasn't been explored before. You can easily keep track of a search topic along with being able to keep track of everything you've written about the particular topic. If you just want to have a hyper focus on tweeting on one specific topic and keeping tack with what is going on with it instead of general Twitter.
The problem with Tweet Note is that while it's ostensibly designed for tweeting, it isn't very optimized for tweeting. When you tweet a paragraph, it doesn't jump to a new one automatically, and just hitting enter will not go to a new tweet - it only goes to a new line in the paragraph. Now, here's the asinine thing about the app: while it seems designed to let you tweet 'paragraphs', if you exceed 140 characters (which is only denoted by the disabling of the tweet button, there's no character count given), you simply can't tweet that paragraph, you can't use a service like TwitLonger to tweet a longer paragraph. As well, the app is limited to just searching for a specific Twitter term, you can't check any of your main timeline or reply feed, so while you get that hyper focus, you can't zoom out to see what else is going on in Twitter, or if you need to track multiple topics at a time.
So really, Tweet Note is an app of curious utility. If you need an app that is specifically limited to just what Tweet Note provides, then Tweet note is an app that will work for you, despite needing a couple of improvements. Otherwise, only pick up this app if you want an app to provide a specific focus, instead of a general Twitter app.