Overview
Isar is a high-performance, fully asynchronous NoSQL database designed for Flutter applications. It offers fast read and write operations with minimal boilerplate, making it ideal for storing structured data locally. Isar supports all major platforms including Android, iOS, Web, macOS, Windows, and Linux. Its simple API enables developers to define models and perform queries with ease, while maintaining strong type safety and real-time updates. Isar is particularly well-suited for apps requiring offline-first functionality or frequent local data access.
Use cases
- Offline-first mobile apps
- Real-time data synchronization
- Local caching of API responses
- User preference storage
- High-frequency data operations
- Cross-platform data persistence
Key features
- Fully async operations
- Zero boilerplate model definitions
- Fast query performance
- Type-safe queries
- Real-time updates
- Supports all Flutter platforms
Suitable for
- Flutter developers needing fast local storage
- Apps requiring offline functionality
- Projects with complex data relationships
- Teams prioritizing developer productivity
- Applications with frequent data reads/writes
Considerations
- Not suitable for large-scale server-side data
- Limited support for complex joins
- Requires careful schema design
- Migration handling requires manual steps
- Best suited for structured, document-like data