SwimUp tracks comprehensive swimming metrics providing complete insight into your performance and progress over time. During workouts, the app monitors total distance swum (in meters or yards), workout duration, pace per 100m/yards, stroke count per lap, SWOLF score (efficiency metric combining strokes and time), heart rate across training zones, calories burned, and rest intervals taken. After each session, SwimUp calculates average pace, fastest intervals, distance per stroke (efficiency indicator), time spent in each heart rate zone, and percentage of workout completed. Long-term analytics include weekly and monthly training volume, completed workout totals, personal records across distances, training consistency, stroke efficiency trends, and calendar heat maps showing your training patterns. SwimUp syncs this data with Apple Health, writing distance, duration, calories, heart rate, and heart rate zones for integration with your broader health tracking. The app displays visual progress charts and trend analysis, helping you identify your strengths, track improvement toward specific goals, and quantify exactly how much faster and more efficient your swimming becomes. Personal record tracking automatically flags your fastest intervals, longest distances, and best efficiency swims across your training history.