The Firestore and the Firebase Realtime database are NoSQL database that means there is no need to create the table and define the schema. In the Realtime database, data is stored as one large JSON tree. In Cloud Firestore, data is stored as a collection of documents . The data is simple, so it is very easy to store.
Read moreIs Firebase paid or free?
Firebase offers a no-cost tier pricing plan for all its products . For some products, usage continues at no cost no matter your level of use. For other products, if you need high levels of use, you’ll need to switch your project to a paid-tier pricing plan. Learn more about Firebase pricing plans.
Read moreIs Firebase pricing per project?
All limits and pricing indicated on the Firebase pricing page apply to each separate project . So in your example neither project would be exceeding the limits of its free plan.
Read moreIs Firebase Realtime Database expensive?
Firebase Realtime Database is fairly expensive ($5/GB of storage per month), so it makes economic sense for developers to migrate to their own backend once they hit a certain scale.
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