---
title: "launchApp(with:completion:)"
framework: matter
role: symbol
role_heading: Instance Method
path: "matter/mtrbaseclusterapplicationlauncher/launchapp(with:completion:)"
---

# launchApp(with:completion:)

## Declaration

```swift
func launchApp(with params: MTRApplicationLauncherClusterLaunchAppParams?, completion: @escaping @Sendable (MTRApplicationLauncherClusterLauncherResponseParams?, (any Error)?) -> Void)
```

```swift
func launchApp(with params: MTRApplicationLauncherClusterLaunchAppParams?) async throws -> MTRApplicationLauncherClusterLauncherResponseParams
```