By default this tracker saves to this browser only. Connect a Google Sheet and every save writes there too — permanent, shareable, reachable from any device. The Sheet builds a Dashboard + 8 stage tabs automatically.
One-time setup — about 5 minutes
Create/open the Google Sheet to use as your database.
In it: Extensions → Apps Script. Delete any sample code.
Copy the code below, paste it in, click Save.
Deploy → New deployment → gear → Web app.
Execute as: Me · Who has access: Anyone → Deploy → authorise.
Copy the Web app URL (ends in /exec), paste above, click Connect.
"Anyone" means anyone with the exact URL can read/write this one Sheet via the script. Keep the URL private.