Risks for Using WebView for Mobile Applications
WebViews pose risks on websites that contain private or sensitive data. To ensure your applications remain secure and optimized for the best possible user experience, follow the best practices below.
Use an approved browser-view mechanism such as Safari View Controller on iOS or Chrome Custom Tabs on Android. Avoid using a WebView or similar custom browser mechanism in your application as it may break functionality for Login With Amazon authorization.
Login With Amazon highly recommends using redirect authentication for mobile web to ensure an optimal user experience.
Note: This does not apply to clients who are using mobile web browsers such as Safari, Chrome, etc.