Press begin. The routine advances itself — your only job is to breathe and hold.
Log on your phone at the gym — it lands on your computer too. Both devices read one shared log in the cloud. Paste your private Worker URL + key once per device (or open the magic link and it fills itself).
Mode A (default, zero setup): each session opens a pre-filled Google Calendar event — you're logged into Google, one click saves it.
Mode B (API): paste an OAuth2 access token below (Google Cloud Console → Calendar API) and events are created directly via the API.
Which workout is today? The rest of the month locks in from this answer — Heavy Duty every 96 hours, conditioning between.