Package selection guidance compiled from public package information, community data, and project usage.
ObjectBox Sync Flutter Libraries provide a high-performance, real-time database solution for Flutter apps, enabling seamless synchronization of Dart objects across devices and platforms. Built on the ObjectBox core, it supports offline-first data management with automatic conflict resolution and efficient sync over networks. Ideal for apps requiring fast local storage and synchronized data across multiple clients, this package integrates directly into Flutter projects with minimal setup. It works across Android, iOS, macOS, Windows, and Linux, making it suitable for cross-platform applications needing reliable, low-latency data persistence and synchronization.
Use cases
Real-time collaborative apps
Offline-first mobile applications
Cross-device data synchronization
High-performance local data storage
Multi-platform data consistency
Key features
Fast local object persistence
Real-time data synchronization
Conflict resolution during sync
Support for multiple platforms
Minimal boilerplate setup
Suitable for
Developers building cross-platform apps
Teams needing real-time data sync
Apps requiring offline functionality
Projects prioritizing performance and scalability
Mobile apps with distributed user data
Considerations
Requires backend infrastructure for sync
Limited to Dart objects with defined schema
Network dependency for sync operations
Learning curve for sync conflict handling
Needs proper schema versioning
Original README
Original README snapshot from the linked source repository. Visit the repository for the latest content.
Flutter database with vector support - easy to use & fast Dart object persistence, plus on-device vector search 💙
Very first on-device vector database for Flutter / Dart AI apps. Intuitive APIs, simply fast.
Persist local Dart objects with ease & speed, efficiently manage vectors.
ObjectBox provides a store with boxes to put objects into:
// Annotate a Dart class to create a Box@Entity()
classPerson{
@Id()
int id;
String firstName;
String lastName;
Person({this.id = 0, requiredthis.firstName, requiredthis.lastName});
}
finalStore store = awaitopenStore(directory: 'person-db');
final box = store.box<Person>();
var person = Person(firstName: 'Joe', lastName: 'Green');
final id = box.put(person); // Create
person = box.get(id)!; // Read
person.lastName = 'Black';
box.put(person); // Update
box.remove(person.id); // Deletefinal query = box // Query
.query(Person_.firstName.equals('Joe') & Person_.lastName.startsWith('B'))
.build();
finalList<Person> people = query.find();
query.close();
ObjectBox Flutter database is an excellent choice for storing Dart objects in cross-platform
applications and the only on-device database that offers you vector support for your on-device AI apps.
Designed for high performance, the ObjectBox Flutter database is excellent for mobile
and IoT devices. ObjectBox consumes minimal CPU, memory, and battery, ensuring that your software is
not only efficient but also sustainable. By storing data locally on the device, ObjectBox allows you
to cut cloud costs and create an app that does not require a connection. Get started with our
intuitive native Dart API in minutes, without the hassle of SQL.
Plus: We built a data synchronization solution that allows you to keep data in sync across devices
and servers, both online and offline.
🏁 High performance - superfast response rates enabling real-time applications.
🪂 ACID compliant - Atomic, Consistent, Isolated, Durable.
💻 Multiplatform - Android, iOS, macOS, Linux, Windows, any POSIX-system.
🌱 Scalable - grows with your app, handling millions of objects with ease.
💚 Sustainable - frugal on CPU, Memory and battery / power use, reducing CO2 emissions.
🔗 Relations - object links / relationships are built-in.
💐 Queries - filter data as needed, even across relations.
🦮 Statically typed - compile time checks & optimizations.
📃 Schema migration - change your model with confidence.
Oh, and there is one more thing...
😮 Data Sync - keeps data in sync offline or online, between devices and servers.
Getting Started
Continue with our ➡️ Getting Started guide. It has resources and video tutorials on how to use ObjectBox in your Flutter or Dart app.
How does ObjectBox compare to other solutions?
ObjectBox is fast. Have a look at our benchmarks below, or test it for yourself
It's a full NoSQL SQLite alternative with intuitive Dart APIs you'll love 💙
It comes with an out-of-the-box Data Sync, making it an effective self-hosted Firebase alternative
Flutter Database Performance Benchmarks
We tested across the four main database operations, CRUD (create, read, update, delete).
Each test was run multiple times and executed manually.
Data preparation and evaluation were done outside the measured time.
Here are the benchmarks for ObjectBox vs sqflite vs Hive (last updated 2021-09-11) 👇
Do you want to check out the ObjectBox code itself? E.g. see it in action, run tests, or even contribute code?
Great! Clone/check out this repository and run this to generate code and get you started quickly:
./tool/init.sh
Also, make sure to have a look at the contribution guidelines - we are looking forward to your contribution.
Packages
This repository holds all ObjectBox Dart/Flutter packages as separate directories:
