Mist - absolutely unsatisfied

Amazon offered free hatvdas program and I immediately slammed shut. It was very confusing and the service not intuitive. But I've come to terms with it because I thought that at least I have a full program without having to spend money on it.
I've done with the app mainly notes on PDFs. When I wanted to save it as a PDF again, the problem started. I have a board of this company found there were a lot of the same problem. Saving in PDF is possible only with Dropbox or other programs via another detour. My Kindle can not be a Dropbox app. What's so hard about making a small button with export to pdf? Is not as if not one of the major file formats.
Bin abeolut dissatisfied. It was fortunate that I have paid no money.