Bridge is a set of Sage-hosted web services and SDKs designed to support a wide variety of biomedical research studies conducted through smartphone interfaces. Bridge provides a secure, HIPAA-compliant service that can accelerate the development and deployment of mobile apps built using Apple Research Kit, Android Research Stack, or other mobile frameworks in studies of human health. Services support mobile registration and consent to participate in research studies, the design and scheduling of surveys and other mobile sensor-driven activities, and the receipt of sensor and survey data from mobile sources. After the Bridge service receives study data from participants’ Android or Apple smartphones, the data is de-identified and hosted in our Synapse platform, a collaborative data science environment where research groups can work with the data. Software developers interested in developing apps using this service should check out our Bridge developer’s portal for documentation and links to code repositories. Researchers wanting assistance with the design or execution of a mobile research study should contact us at firstname.lastname@example.org.