# AVSystemRouteLaunchModeApplication Launches the corresponding application on the remote device. ``` AVSystemRouteLaunchModeApplication ``` ## Discussion Use this mode when you want to start your app’s counterpart on the remote device, enabling app-to-application communication and custom playback experiences. The remote application can handle the provided URL and maintain bidirectional communication through the `AVSystemRouteDataChannel` returned in the completion handler. Application identifiers must be configured in the `MDESupportedProtocols` key in your app’s `Info.plist` file. For example: ```xml MDESupportedProtocols com.example.sharingprotocol com.example.myapplicationidentifier ``` > Important: If `MDESupportedProtocols` is not set, calls to > ``doc://com.apple.avsystemrouting/documentation/AVSystemRouting/AVSystemRouteSession-5i6j6/startWithCompletionHandler:`` fail. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)