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Reference

On-demand resources size limits

On-demand resources are app contents that are hosted on the App Store and are separate from the related app bundle that you download. They enable smaller app bundle, faster downloads, and richer app content.

There are limits on the amount of storage used by on-demand resources for when you upload your app to App Store Connect or while the app is running.

Note: macOS and watchOS don't support on-demand resources.

On-demand resource sizes

The table below outlines the variant size limits for each deployment target after app thinning. For example, the total size limit of each asset pack is 8GB after thinning for apps available on devices running iOS 18 and later.