Cloud Firestore from Firebase is a flexible and scalable NoSQL cloud database. It helps us in the development of real-time applications with synchronization technologies between clients that make our app fast and functional.

In this chapter, we are going to make some changes to our Favors app. We will do the following:

• Transfer our Favors listing to Firebase
• See how to add rules so that a user cannot access another user's favors
• Send/store a favor request to another user/friend in Cloud Firestore