Firebase (Google) pricing context

Firebase offers two plans. The Spark Plan (free, no payment method required) includes generous no-cost quotas: 1 GiB Firestore storage, 50K Firestore reads/day, 20K writes/day, 10 GB Realtime Database download/month, 1 GB Realtime Database storage, 10 GB Hosting storage, 5 GB Cloud Storage, unlimited FCM messaging, and unlimited Analytics and Crashlytics. Many operational tools (A/B Testing, Remote Config, In-App Messaging, Performance Monitoring, App Distribution) are permanently free. The Blaze Plan (pay-as-you-go) retains all Spark quotas and adds usage-based billing: Firestore at ~$0.18/100K reads and writes; Realtime Database at $5/GB stored and $1/GB downloaded; Cloud Functions at $0.40/million invocations; Cloud Storage at $0.026/GB stored; Hosting at $0.15/GB transferred. Phone authentication is billed per SMS by region. SQL Connect (Firebase Data Connect) adds managed PostgreSQL via Cloud SQL, starting at ~$9.37/month after a 3-month free trial. New Blaze accounts are eligible for $300 in Google Cloud credits.