Quite a lot, really. You’ll get heart rate zone and graph, average and peak heart rate, DPS*, stroke rate, SWOLF**, fastest 100 yard time, lap breakdown, lap time, turn time, stroke count, swimming time, calories burned, total distance, total laps.
DPS* = distance per stroke.
SWOLF** = SWOLF is an abbreviation for “Swim Golf”, and is a score obtained by adding together your strokes per length, and the time for the length. e.g. 25 yards swim at 30 seconds in 20 strokes is a SWOLF score of 50.