Downloaded it for the sole reason of marking up pdfs. All my Korean learning textbooks and workbooks are pdfs so i needed a way to write on them on my Amazon tablet. Found out the marking up pdfs option is for premium only. If you need to pay for it then why not say it in the description? However the normal note taking part is decent, I really liked it because it was easy to use, but the pdf issue through me off. Please update the description and tell us you need to pay to mark up pdfs.