Welcome to the JTrack Platform

JTrack is an open-source platform, free of charge, for remote assessments of individuals in situ using smartphones and wearables.

Developed by the Biomarker Development Group at the INM – Institute of Neuroscience and Medicine (INM-7, Brain and Behaviour) of the Research Center Jülich (FZJ), JTrack is adaptable, configurable, and scalable, with a strong focus on security and privacy.

More than just a single application, JTrack enables researchers to create and manage studies, collect data from smartphones and wearables, and share research data through one unified platform.

If you are interested in using JTrack in your studies, please reach out to us at: biomarkers.inm7@gmail.com

Platform Components

The platform includes three main components:

JTrack Social

Enable passive sensing of social interactions, activity context, and daily-life behaviors to support longitudinal digital health and behavioral research.

JTrack EMA

Collect ecological momentary assessments, daily symptoms, and study questionnaires directly from participants in real-world settings.

JDash

Create studies, manage participants and surveys, configure sensor collection, and monitor study compliance and data quality from a single interface.

Database

Centralized BIDS-compliant repository for study metadata, participant records, sensor data, and EMA assessments supporting reproducible research workflows.

Minimal App Requirements

JTrack Social

iOS: iOS 16+

Android: Android 14+

iOS 15 supported up to App Version 2.47.

JTrack EMA

iOS: iOS 16+

Android: Android 12+

Publications

• JTrack: A Digital Biomarker Platform for Remote Monitoring of Daily-Life Behaviour in Health and Disease

• System Comparison for Gait and Balance Monitoring Used for the Evaluation of a Home-Based Training

• JTrack-EMA+: A Cross-platform Ecological Momentary Assessment Application (preprint)

Contact Us

Interested in using JTrack in your study? Please get in touch with our team: Contact

We also offer a weekly JTrack Zoom Hour, where we answer all questions regarding JTrack. It takes place on Tuesdays from 1 to 2 pm German time. If you would like to join, please let us know, and we will send you the Zoom details.