Realm vs Core Data

Developers should learn Realm when building mobile apps that require high-performance local data storage with real-time updates, such as chat applications, collaborative tools, or offline-capable apps meets developers should learn core data when building apple platform apps that require persistent data storage, such as to-do lists, note-taking apps, or any application needing local data caching. Here's our take.

Realm

Nice Pick

Developers should learn Realm when building mobile apps that require high-performance local data storage with real-time updates, such as chat applications, collaborative tools, or offline-capable apps

Pros

• It's particularly useful for scenarios where complex object relationships need to be managed efficiently without manual SQL queries, and when seamless synchronization with a backend (via Realm Sync) is needed for multi-user experiences
• Related to: react-native, flutter

Cons

• Specific tradeoffs depend on your use case

Core Data

Developers should learn Core Data when building Apple platform apps that require persistent data storage, such as to-do lists, note-taking apps, or any application needing local data caching

Pros

• It is particularly useful for handling complex object relationships and ensuring data integrity across app sessions, making it a standard choice for iOS/macOS development where seamless data persistence is needed
• Related to: swift, objective-c

Cons

• Specific tradeoffs depend on your use case

The Verdict

These tools serve different purposes. Realm is a database while Core Data is a framework. We picked Realm based on overall popularity, but your choice depends on what you're building.

The Bottom Line

Realm wins

Based on overall popularity. Realm is more widely used, but Core Data excels in its own space.