Welcome
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.
What's new?
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 here.
Access our new Flutter Android SDK plugin here.
11/11/22 - Body composition biomarkers/insights added (Alpha)
Added an Alpha version of body composition biomarkers/insights such as bodyFat and androidByGynoid to Spren API.
10/19/22 - Drop-in result components added
Added drop-in results components, allowing partners to use SprenUI on iOS and Android. See Spren Vision docs.
09/14/22 - Apple Watch support added
Added Apple Watch as a device from which inter-beat intervals (IBIs) may be accepted. See our API Docs for more info.
07/15/22 - Added rmssd and breathingRate to Spren API production environment: rmssd value and breathingRate can now be returned alongside HRV score and heart rate values, (results after POSTing to the /submit/sdkData endpoint) in Spren API production environment. See our API Docs.
07/15/22 - Released update for React Native (2.0.0) which adds support for Spren Vision Android SDK (Alpha):
We expanded React Native support to Android so it is now available for both Spren Vision iOS SDK and Android SDK (Alpha)! Try it now.
Please also see these breaking changes included in this release.
07/14/22 - Released update for Flutter plugin (2.0.1):
Updated plugin to include these breaking changes and added new LICENSE file.
06/29/22 - RMSSD and Breathing Rate added to Spren API test environment: RMSSD value and breathing rate can now be returned alongside HRV score and heart rate values. Currently only available in the test environment. See our API Docs. 06/16/22 - Flutter plugin for Spren Vision Android SDK (Alpha) available: We expanded Flutter support to Android so it is now available for Spren Vision iOS SDK and Android SDK (Alpha)! Try it now.
Subscribe to receive emails about SDK and API updates and developer news.