Welcome to the Spren Developer Portal. Embed meaningful biomarker insights into your app, including heart rate variability, heart rate, respiration rate, body fat, acute mental stress score, physiological-based activity guidance, cardiorespiratory fitness score, and more. 

Power-up your app with Spren's SDKs or bring your own device and use a simple API call. The Spren SDKs combine years of targeted R&D and billions of data points to extract deep, meaningful insights from an accessible phone camera.

Your brand and design stay front and center while, behind the scenes, Spren translates complex physiological data into deep, personalized insights that enrich your user experience and increase both engagement and behavior change.

Released update for Android SDK and corresponding Flutter plugin and React Native Wrapper


Updated the Android SDK to fix compatibility with certain international Samsung devices. Learn more 

12/23/22 - Released update for Android SDK and corresponding Flutter plugin (2.2.0)

We've updated the Android SDK to be more robust at handling reading start conditions; these new updates have also been tested and deemed compatible on more Android devices. 

Learn more about our Android SDK and compatible devices 

Access our new Flutter Android SDK plugin 

10/19/22 - Drop-in result components added

Added drop-in results components, allowing partners to use SprenUI on iOS and Android. See 

Added Apple Watch as a device from which inter-beat intervals (IBIs) may be accepted. See our 

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Discover how the Spren Developer Portal can revolutionize your mobile app development. Incorporate biomarker insights, like heart rate and respiration rate, using our SDKs and APIs. Our platform enhances user experience, promotes engagement, and fosters b