I guess the description is a little unclear to me. It appends a hashtag to tweets and schedules them. Isn't launched yet. Is a paid service. Is that correct, and is that pretty much all I need to know?
So, Hasher attempts to solve the problem when someone wants to do some kind like "tweet-storm", or in short, a series of thoughts.
We found that doing "tweet-storm" using Twitter client or direct on the website is full of distraction. Moreover, when other users give their comments to a specific tweet, we tend to reply them one by one. So the chance of the idea on our mind will be disappeared is high.
Well, we plan to launch not only a paid service, but also a free one with some limitations.
I hope my explanation is clear enough, but feel free to ask me anything, would be glad to help. :)