Firebase Realtime DB vs Firestore

• Firestore has better querying and more structured data
• document-model database 
• store data in Documents, organized into Collection
• Each document contain a set of key-value pairs.
• Documents can contain sub collections and nested objects.
• Search multiple field.
• Realtime DB better latency

Pricing Model

• Realtime DB = amount of downloaded and store on DB.
• Firestore DB = number of reads or write.
• Traditional App, Request large of data > Firestore
• Many updates in second > Realtime

Firestore Data Model

• Similar to JSON
• Document is record, map value with name
• name of document is unique (add() will automatically)