A backend-agnostic framework for multivariate and A/B testing in iOS and macOS apps.
SkyLab is an open-source framework for implementing multivariate and A/B testing in iOS and macOS applications. It provides a backend-agnostic solution to run experiments, allowing developers to test different features or designs with users. The framework persists test conditions across app sessions to ensure consistent user experiences.
iOS and macOS developers who need to integrate A/B or multivariate testing into their apps without being tied to a specific backend service.
Developers choose SkyLab for its simplicity, flexibility to work with any statistics backend, and reliable persistence of test assignments, making it a lightweight yet powerful tool for experimentation.
Multivariate & A/B Testing for iOS and Mac
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SkyLab doesn't lock you into a specific analytics service; you can integrate with any backend via custom endpoints or HTTP headers, as highlighted in the README's philosophy.
Test conditions are persisted using NSUserDefaults, ensuring users remain in the same A/B bucket across app launches, preventing inconsistent UI flickering.
The framework provides clear block-based methods for A/B, split, and multivariate tests, making implementation straightforward with examples in the README.
Split tests allow custom weights via NSDictionary, enabling precise control over experiment distribution without complex coding.
The README explicitly states SkyLab is no longer maintained, meaning no bug fixes, iOS version updates, or security patches, posing long-term risks.
SkyLab is written in Objective-C, which may require bridging in Swift projects and lacks native support for modern Swift paradigms like SwiftUI.
While backend-agnostic, developers must build their own analytics pipelines for data collection and analysis, adding development overhead compared to all-in-one solutions.
Relying on NSUserDefaults for persistence can become inefficient for apps with hundreds of experiments or need for advanced targeting and segmentation.