Apple Fitness Effort Slider

This interaction showcases the effort rating slider in Apple Fitness. Tapping the effort row on the workout summary screen slides up a full-screen bottom sheet. The slider is composed of ten vertical bars of increasing heights. As the user drags or scrubs across the slider, the active bar scales up in both width and height while the other bars shrink. Simultaneously, the entire background color of the screen smoothly morphs to reflect the selected intensity (ranging from green for easy, to blue/purple for moderate, and deep magenta for hard). Tapping 'Update' slides the sheet down and updates the summary screen with the newly selected effort badge.