LaunchDarkly Client-side SDK for Flutter

Action Status Pub

LaunchDarkly overview

LaunchDarkly is a feature management platform that serves trillions of feature flags daily to help teams build better software, faster. Get started using LaunchDarkly today!

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Platform Support

Android iOS MacOS Web Linux Windows

Getting started

Refer to the SDK documentation for instructions on getting started with using the SDK.

Learn more

Read our documentation for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the complete reference guide for this SDK or our code-generated API documentation.


We run integration tests for all our SDKs using a centralized test harness. This approach gives us the ability to test for consistency across SDKs. These tests cover each method in the SDK, and verify that event sending, flag evaluation, stream reconnection, and other aspects of the SDK all behave correctly.


We encourage pull requests and other contributions from the community. Read our contributing guidelines for instructions on how to contribute to this SDK.

About LaunchDarkly

  • LaunchDarkly is a feature management platform. We empower all teams to deliver and control their software. With LaunchDarkly, you can:
    • Roll out a new feature to a subset of your end users, such as a group of end users who opt in to a beta tester group, and gather feedback and bug reports from real-world use cases.
    • Gradually roll out a feature to an increasing percentage of customers, and track the effect that the feature has on key metrics. For instance, how likely is a customer to complete a purchase if they have feature A versus feature B?
    • Turn off a feature that is causing performance problems in production, without needing to re-deploy or even restart the application with a changed configuration file.
    • Grant access to certain features based on end user attributes, like payment plan. (For example, customers on the ‘gold’ plan have access to more features than customers in the ‘silver’ plan).
    • Disable parts of your application to facilitate maintenance, without taking everything offline.
  • LaunchDarkly provides feature flag SDKs for a wide variety of languages and technologies. Read our SDK documentation for a complete list.
  • Explore LaunchDarkly


This is the API reference for the LaunchDarkly Client-Side SDK for Flutter.