In general, there are mainly two types of apps to read PDF books on Android. First, there are the apps that cater to business use, and which require you to open a PDF file, and then fill in and sign a form and upload for further action. A majority of the digital publishers use the PDF format for their eBooks which people can access on their smartphones and tablets. These apps for reading PDF books on Android include features such as reading mode, scrolling mode, and support for chapters among others. With such an app there is no need to download other multiple apps for various tasks as it enables all the operations in one place. While there are several apps to read PDF books on Android, here, in this article, let us learn more about the best app to read PDF books on Android.