[Home](./index.md) > [@firebase/firestore](./firestore.md) > [/](./firestore_.md) > [FirebaseFirestore](./firestore_.firebasefirestore.md) > [app](./firestore_.firebasefirestore.app.md) ## FirebaseFirestore.app property The [FirebaseApp](./app.firebaseapp.md) associated with this `Firestore` service instance. Signature: ```typescript get app(): FirebaseApp; ```