SDK (Software Development Kit)

A Software Development Kit (SDK) is a collection of software tools, libraries, documentation, code samples, and APIs that developers use to build applications for a specific platform or integrate with a specific service. SDKs abstract the complexity of underlying systems and provide standardized interfaces that accelerate development and ensure consistent implementation.

In the context of health technology, SDKs enable developers to embed contactless vital signs capabilities directly into their own applications without building the underlying computer vision and signal processing technology from scratch. A health-focused SDK typically includes camera access modules, face detection, signal extraction algorithms, vital sign computation, and data formatting for integration with backend systems.

Circadify provides cross-platform SDKs for iOS, Android, and web applications that enable developers to add contactless vital signs measurement to their products. The SDK handles the full measurement pipeline from camera initialization through vital sign extraction, delivering results via callbacks or API responses. This allows telehealth platforms, fitness apps, insurance applications, and other health technology products to offer rPPG-based vitals with minimal integration effort.