Show HN: Stopwatch web app for embedding or full-screen display (github.com)

Hi. I've been using Notion for all my paperwork and often times I wanted a simple stopwatch for timing my activity. Unfortunately Notion doesn't currently have anything like that but it embeds other URLs quite nicely, and that's when it hit me; I could make something and embed it on my documents.

Fits well also for full-screen display, large or small.