For decentralized clinical trials
Every at-home step, seen and confirmed.
Witness coaches trial participants through at-home procedures with their phone camera and voice, and gives the study team a time-stamped record of each step.
Hackathon demo · synthetic data only · not medical guidance
How it works
A coach for the participant. A witness for the study team.
- 01
Coach
One step at a time, in large text and a calm voice. Built for older adults at home, with a button for every voice command.
- 02
Check
The phone camera checks each step. A step counts only after three matching frames in a row, so one blurry frame never decides anything.
- 03
Record
The study team gets a time-stamped timeline with evidence frames. A skipped critical step stops the procedure and routes to the nurse.
Safety by design
Built to stop, not to guess.
When Witness is unsure, it pauses or stops and sends the participant to a human. The study team reviews every flag.
Flags and records. A human decides.
Witness never makes a medical decision.
Stops when it isn't sure.
Uncertainty pauses or stops; it never says “carry on”.
No model-written words.
Patients only hear scripts the study team reviewed.
Never any dosing advice.
Dose language in a protocol is flagged for review.