A very simple static webpage to help with timing of mHealth experiments (or any other experiments). A rework of the original.

• Add "events" with duration in seconds
• Export events as JSON (copy text area)
• Import events as JSON
• Countdown timer for each event in sequence
• Record start and end time of each event
• Export event times as CSV

Open index.html in a browser or, preferred, run a local webserver to serve the static site

python -m http.server 8000