New 64-bit requirement for watchOS apps
<p>Beginning April 2026, watchOS apps uploaded to App Store Connect must also include 64-bit support and be built with the <a href="https://developer.apple.com/watchos/whats-new/">watchOS 26</a> SDK. To enable 64-bit support in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with 64-bit code.</p><p>You can test ARM64 compatibility for your apps in the Xcode Simulator, and on Apple Watch Series 9 or 10, or Apple Watch Ultra 2 running watchOS 26 beta.</p><p><a href="https://developer.apple.com/support/xcode/">Learn more about the SDKs included <span class="icon icon-after icon-chevronright nowrap">in Xcode</span></a></p>
July 22, 2025
Beginning April 2026, watchOS apps uploaded to App Store Connect must also include 64-bit support and be built with the watchOS 26 SDK. To enable 64-bit support in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with 64-bit code.
You can test ARM64 compatibility for your apps in the Xcode Simulator, and on Apple Watch Series 9 or 10, or Apple Watch Ultra 2 running watchOS 26 beta.
Learn more about the SDKs included in Xcode
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