[Home](./index.md) > [@firebase/app](./app.md) > [deleteApp](./app.deleteapp.md)
## deleteApp() function
Renders this app unusable and frees the resources of all associated services.
Signature:
```typescript
export declare function deleteApp(app: FirebaseApp): Promise;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| app | [FirebaseApp](./app.firebaseapp.md) | |
Returns:
Promise<void>
## Example
```javascript
deleteApp(app)
.then(function() {
console.log("App deleted successfully");
})
.catch(function(error) {
console.log("Error deleting app:", error);
});
```