Cloud Firestore

Cloud Firestore is Google's managed NoSQL document database, offered through Google Cloud and Firebase. It stores data as collections of documents rather than rows in a relational table. [Google Firestore documentation](https://firebase.google.com/docs/firestore)

A web or mobile client attaches a snapshot listener to a document or query, and Firestore sends a new snapshot when matching data changes. Firebase SDKs support this pattern for web, Android, and iOS apps, which makes it useful for chats and live dashboards. [Listen to realtime updates](https://firebase.google.com/docs/firestore/query-data/listen)

Firestore SDKs support offline persistence on Android, Apple platforms, and the web, so an app can keep reading cached data during a connection loss. Local writes are synchronized when the connection returns, subject to Firestore's security and conflict rules. [Offline data](https://firebase.google.com/docs/firestore/manage-data/enable-offline)

Firestore billing covers document reads, writes, deletes, storage, and network use rather than charging one flat fee per app user. A live listener can create additional reads as documents are added or changed in its result set, so query design matters for a busy dashboard. [Firestore pricing](https://firebase.google.com/docs/firestore/pricing)