Realm Database

Health v2 · maintenance only

Adoption not part of the score

1055 stars · 220 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Realm is an object-oriented mobile database that runs directly on phones, tablets, and wearables, serving as a replacement for SQLite and Core Data. It offers live objects with reactive change notifications, offline persistence, and SDKs for Swift, Java, Kotlin, JavaScript, and .NET.

Use cases

• store data offline in a mobile app
• replace SQLite or Core Data in an iOS app
• build reactive UIs that update when data changes
• persist objects in an Android app without writing SQL
• use a local database with SwiftUI
• manage app data on wearables and embedded mobile devices

When to choose

• you need an offline-first local database on mobile platforms
• you want an object-oriented data model without an ORM layer
• you need reactive/live queries that automatically update your UI
• you want a lightweight, battery- and memory-efficient database on phones

When to avoid

• you need a server-side or multi-client relational database
• your project depends on MongoDB Atlas Device Sync, which is being deprecated
• you need complex SQL queries or joins
• you target platforms without a Realm SDK

Facets

library · maturity active

database orm caching sdk mobile-development databases cross-platform developer-tools jvm dotnet cpp cross-platform mobile-database offline-first reactive-queries live-objects sqlite-alternative core-data-alternative swiftui thread-safe realtime-sync object-database ios android macos swift mobile

Member repositories

For agents

markdown · JSON · MCP: product_card(name="realm/realm-core")