The Google Play Books app and Kindle app are e-book readers for mobile devices. Both apps feature similar reading and navigational interfaces, but the apps are affiliated with different services and networks. Therefore, their supported file types and storage options differ.
You must purchase books for the Google Play Books app through the Google Play Store. The Google Play Store is a standalone app on Android devices and is also accessible via a Web browser. Both the Google Play Books app and the Google Play Store are linked to your Google account.
The Amazon Kindle app links to the Amazon Kindle Store. You can access the Kindle Store from within the Amazon Kindle app and purchase items with your Amazon account on most mobile devices, or you can download and read books archived on your Amazon.com account.
Because both the Google Play Books app and Google Play Store are linked to your Google account, any books that you purchase through the Google Play Store are available wherever you can access your Google account. For example, you can read books you have purchased through the Google Play Store in an Internet browser after you sign in to your Google account.
The Kindle app is linked to your Amazon account. If you have a Kindle, your Kindle appears on the list of devices within the Kindle app. Furthermore, your Amazon Kindle books for all of your devices appear in the Kindle app Archive section. Therefore, you can access your Kindle books even if you did not purchase them directly through the Kindle app.
The navigational interfaces of each app differ slightly. Both apps allow you to turn pages by sweeping across the screen. You can see your place in the book relative to the beginning and end by tapping the screen in both apps.
Both apps make it possible for you to tap and hold to highlight or bookmark your books. The Amazon Kindle app features a collapsed options menu tray at the bottom of the screen. In the Google Play Books app, the options menu is accessible only after you tap the screen.
Supported Formats and Storage
The Google Play Books app supports EPUB, PDF and ACSM files. ACSM files are e-books protected with digital rights management. The Kindle app supports the same selection of formats as the Kindle devices: AZW, TXT, MOBI, PRC and PDF. Both apps allow you to download books to your device.
The default library menu for the Google Play Books app displays all the books you have purchased; books that are on your device are marked with a blue thumbtack icon. The Kindle app displays the library of books on your device and offers a separate “Archive” tab to display the other books associated with your account. You can download books onto your device from this menu.