Follow a plan. See the truth.
Coaches publish structured training plans — marathon, triathlon, Ironman — and athletes follow them on a calendar. Saga imports your completed workouts and matches each one to the session it was meant to be, so you can see what you actually did against what was prescribed.
Workouts sync from Apple Health, including activities your watch writes there. Adherence, streaks, and week-by-week progress are calculated from real training, not self-reporting.