You can then browse the ebooks in your Calibre library and download them to your Android device directly from within FBReader. Tap OK, configure the available options if needed, and tap OK. Specify the URL of Calibre's content server which should look something like this: (replace 192.168.1.9 with the actual IP address of the content server). Launch FBReader on your Android device, tap on Search on the main toolbar, then tap on Add Catalog.

To do this, launch Calibre on your machine, press the Connect/share button on the main toolbar, choose the Start Content Server command, and note the IP address of the content server. To make use of this functionality, you need to enable Calibre's built-in content server first. This is, indeed, a nifty feature which can be used to effortlessly transfer ebooks from an existing Calibre library to your Android device. Besides a comprehensive feature set, the app also lets you obtain ebooks from different sources, including the Calibre library stored on your machine. FBReader is undeniably one of the best ebook reader apps available on the Android platform. calibre itself does not run on phones/tablets but you can connect to calibre running on your home computer, read books and manage your library in several ways.

Calibre android storage