If you’re a Kindle user on Android, there’s a good chance you’ve used the Kindle app to sign out of your account. If not, it’s time to do so. To sign out of the Kindle app on Android, open the app and click on the three lines in the top left corner of the screen. On the left side of this screen, you’ll see a list of apps. Scroll down and select “Amazon Kindle.” Then click on “Sign Out.”