The video shows a close-up of a smartphone screen displaying a fitness tracking app. The app shows the user's exercise history, including walks, bike rides, and runs. The user has completed 3 out of 5 days of their fitness challenge. The app also shows the user's heart rate and calorie burn during each activity. The user's heart rate is displayed as 72 calories burned during a walk, 119 calories burned during a bike ride, and 101 calories burned during a run. The app also shows a graph of the user's heart rate during each activity.