Is Firestore free?
Generous free tier: 1GB storage, 50K reads, 20K writes, 20K deletes per day. Pay-as-you-go after.
What is Firestore?
Firestore is a NoSQL document database from Google. Real-time sync, offline support, scales automatically. Part of Firebase.
Firestore vs MongoDB?
Both are document databases. Firestore is serverless with real-time sync. MongoDB more flexible for complex queries. Firestore for apps; MongoDB for general use.
When to use Firestore?
Mobile and web apps needing real-time sync, offline support, and simple backend. Not for complex queries or analytics.