Understanding Simple Sign-in
Simple Sign-in (SSI) simplifies the sign-in experience for your apps on Fire OS devices by eliminating the need for customers to remember and manually type their login credentials (user name and password) to log into your apps on multiple devices.
Remembering login credentials for multiple apps is a common pain point for customers when they switch or upgrade to a new device and must sign into each app manually to finish the setup. Simple Sign-in addresses this by allowing customers to log into an app on a new device through a single click, with an account they already use on other devices. It works based on opaque tokens issued by you, representing the identity of your users, which doesn't require storing the user's raw login credentials.
Terms you should know
These terms have the following meaning within this document.
App
App refers to your application in the Appstore.
Device
An Amazon device. Supported on Fire TV and Fire tablet.
App instance
A specific instance of your app running on a customer device.
First device
This is the first device a customer uses to log into an app manually by providing their login credentials. It might not be the first device a customer sets up. In the context of Simple Sign-in, it's the first device a customer uses to log into an app manually by providing their login credentials.
New or additional device
Any device a customer uses to sign into an app after the first device is a new or additional device with respect to that app.
Standard sign-in
The standard sign-in options supported in your app without Simple Sign-in integration. In scenarios where Simple Sign-in is not feasible, users are guided through the standard sign-in.
Last updated: Mar 13, 2023