Tracking your reps and weights in the Moves App is simple:

For each set, enter the number of reps you performed and the weight you used. Almost always, reps will be prescribed for each exercise – in this case you'll just enter the weight you used. Sometimes, only time is prescribed or the set is to be performed "to failure" – in which case you will want to record how many reps you did in the time allotted or when you reached failure.

To see your past reps and weight, tap the three dots next to an exercise, then select "Exercise History." This option is available in both the List View and Guided View and will update every time you complete a workout.

Keeping track of your progress helps you monitor and improve your performance over time.