A free program for Android, by Bigbaball Indie.
With PDF Reader & Viewer, you can easily read PDF files and make notes on them. It also lets you annotate, highlight, underline, and make remarks on the text, so you can easily keep track of things you need to do later.
The best thing is that this application is so easy to use. It works perfectly on Android phones and tablets. It doesn't have any complicated user interface. You don't need to install anything else to use it.
You can also use it to add your own notes to PDF files. You can even do that without having to save the file to your phone or tablet.
