How to Install the Kindle App for iPad/iPhone The Kindle app can be used on any iPad, iPhone, or iPod touch with iOS 3.2 or greater installed. Installing the Kindle App Visit the App Store and download the Kindle app to start reading from your iPad, iPhone, or iPod touch. To install the Kindle app: 1. Tap the App Store icon on the home screen of your iPad, iPhone or iPod touch. You can also get the app through the iTunes Store. 2. Search for "Kindle" or find it in the alphabetical list of apps. 3. Follow the on-screen installation instructions. When installation is complete, tap the Kindle icon on your device to open the reading app. Registering the Kindle App To register your Kindle app, use your existing Amazon account e-mail address and password. If you live outside the United States and use the Kindle application, please see the Using the Kindle App if You Live Outside the United States Help page. Logging into your Amazon.com account through the Kindle app registers your device to your Amazon.com account. Once you sign in during registration, you won't need to do it again -- just open the app to access your Kindle Library. To register: 1. Tap the Kindle icon on your iPad, iPhone or iPod touch to open the reading app. 2. Enter your Amazon.com account e-mail address and password. 3. Tap the "Register" button. You can also tap the Settings icon (the cog) on the Kindle Home screen to view or change your account registration. Signing Out and Deregistering If you sign out of the Kindle app, your reading app is deregistered from your Amazon.com account. When you deregister, you can't download content to the Kindle app or send purchases to the app unless you register again. To deregister using the Kindle app: 1. Tap the Kindle icon on your iPad, iPhone or iPod touch. 2. Tap the Settings icon in the lower right-hand corner of the screen. 3. Tap "Update" under the Registration field and then tap the Deregister button. To deregister online: 1. Visit Manage Your Kindle on Amazon.com. 2. Open the Manage Your Devices section and locate your registered Kindle app. 3. Click the "Deregister" link. http://www.amazon.com/gp/help/customer/display.html/ref=hp_ipst_inst?nodeId=200438220&# installing .