Match2Cal от Luke McCoy

Match2Cal adds a toolbar button that reads match details directly from any PractiScore.com page — title, date, location, squad number, and squadmates — and sends them to match2cal.com where you can add the match to Google Calendar, Apple Calendar, or download an ICS file in one click.

Works on both the public match registration page and your personal shooter page after you've signed up. No account required, no data collected, no ads.