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Registration provides access to map tiles and geocoding services. Registration is specific to each app, and separate registration is required for debug and release builds. In order to load map tiles during testing, you must register the debug build of your app. https://developer.amazon.com/public/apis/engage/maps/doc/building-and-testing-your-maps-app#Registering%20Your%20App%20to%20Use%20the%20Amazon%20Maps%20API if the problem is after submitting to appstore. give us more details in Contact Us( https://developer.amazon.com/help/contactus.html ) like app name and copy this link in the message. We need to make sure the key's MD5 is linking and your app is registered. Release registration is a separate process and occurs automatically when you submit your app, if you have already created a debug registration.