Core Data vs Realm

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 meets 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. Here's our take.

Core Data

Nice Pick

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

Realm

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

The Verdict

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

The Bottom Line

Core Data wins

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