HomeHacker News Show HN: A Heart Rate Monitor App Written in Vanilla JavaScript https://ift.tt/2LuQ6Iy byHat hair -January 13, 2021 0 Show HN: A Heart Rate Monitor App Written in Vanilla JavaScript https://ift.tt/2XFDZe2 January 14, 2021 at 02:49AM Tags: Hacker News Facebook Twitter