Existing apps in the Amazon Appstore can now run on Windows 11 through the Windows Subsystem for Android™️ (WSA). While most Windows devices use either Intel or AMD processors based on x86 architecture, most Android applications are built with support for ARM Application Binary Interface (ABI). The Windows Subsystem for Android (WSA) uses Intel Bridge Technology (IBT) to emulate ARM® applications on x86 based processors.
Android apps built with ARM binaries run on WSA through an emulation layer within Windows 11. In order to address additional performance overhead from the emulation process, we recommend providing an x86 and ARM version of your app which will allow apps to be executed directly on the native hardware. This article covers how to target x86 binary files to optimize your app across Amazon devices and supported PCs. By targeting Windows devices with an app bundle/apk containing the target architectures you will help your customers have a great experience with your app wherever they choose to install it.
Target architecture in Unity:
If your game uses a compatible version of the Unity game engine, follow these steps to enable x86/x86-64 Android targets:
Target architecture Gradle/ndk-build/CMake:
Adding support for x86 and x86_64 can impact the size of native libraries. We recommend taking advantage of Android App Bundle to minimize the size impact of including support for 4 architectures (arm64-v8a, armeabi-v7a, x86, x86_64). You can submit your aab binary for both Fire tablets and Windows 11 devices.
Ensure each app bundle has a unique version code (configure versioning)
The Android App Bundles format was announced by Google as a mandatory format for new Google Play app submissions beginning August 2021. We recommend submitting an AAB binary when targeting multiple ABIs, allowing files to be optimized for size before they are downloaded and installed across devices. Once you have prepared your app for Windows devices, you can submit your app to target Windows 11. If you are not able to submit an AAB build and are concerned with the size of your APK file, the Developer Console provides developers the option to add multiple binaries for the same app. To avoid errors during app submission when using multiple binaries, ensure each package has a unique version code and use the same package name for each binary within the same application listing:
By supporting both ARM and X86 ABIs to target Amazon devices and Windows 11, you can optimize your app so that your customers can have a seamless cross-platform user experience. To learn more about optimizing your app performance for Windows 11, be sure to read our related articles on mapping inputs with WSA, improving startup times, and the launch announcement for Amazon Appstore for Windows 11.