iTrace vs Labvanced

iTrace is a free, MIT-licensed toolkit for analyzing webcam eye-tracking data, with a scientific core built on NumPy and SciPy. It computes gaze in degrees of visual angle and detects fixations, saccades, and microsaccades using I-VT, I-DT, and Engbert–Kliegl methods. Pupil tools include blink detection and interpolation, preprocessing, and eye-crop segmentation measured in pixels or relative to iris size. Affine screen-space calibration reports calibration error and gaze-quality measures. The command-line tool analyzes gaze CSV files and exports JSON reports. Optional webcam capture uses OpenCV and MediaPipe, and optional interfaces include a local HTML app using FastAPI and WebSockets and a Streamlit dashboard. Live workflows can export derived gaze, pupil, and capture CSVs. By default, the workflow does not save raw eye video or persisted eye-crop images, though live viewing may send a temporary JPEG crop to a browser over a local WebSocket. The project says its checks use synthetic ground truth rather than real eye-tracking data or a reference device. Webcam pupil size is a relative proxy, not a measurement in millimetres.

Labvanced is a no-code platform for designing and running behavioral research experiments. Researchers use graphical tools to build studies and can collect millisecond-precise reaction-time measures and webcam-based eye tracking. Study elements include questionnaires, audio and video stimuli, mouse tracking, and real-time multi-participant sessions. Labvanced documents recruitment integrations including Prolific, CloudResearch, Sona Systems, Besample, Panelabs, Amazon Mechanical Turk, and Clickworker. Its desktop app can connect EEG systems, eye trackers, motion sensors, and wearables through Lab Streaming Layer, and can run locally without internet access; that app is available to group and departmental license holders for Windows, MacOS, and Linux Ubuntu. A Chrome extension enables controlled studies on live third-party websites while recording gaze, clicks, hovering, and scrolling. Labvanced says webcam eye-tracking video is not sent to its servers or experimenters by default. The free plan includes 300 MB of storage, 10 recordings, and one active recruiting link. Paid tiers list live chat, with some adding premium email support or onboarding. Labvanced was released in 2018 and is maintained by Scicovery GmbH.