Underneath: How Apps Are Made

You use apps every day. What happens underneath the screen? Why does a tap change a number? How can a few lines of code create a whole list? What is that loading spinner waiting for? Underneath helps you understand by changing a small example app and watching it respond. No programming experience required. Start with Sprout, a plant-watering example app. Change its words, adjust numbers and colors, and rearrange its layout. The preview responds as you experiment. Tap something on the screen to find its code, or select a line of code to see what it controls. 10 hands-on lessons • See how code describes words, appearance, and layout. • Discover how taps change state, data fills lists, and conditions decide what appears. • Explore connected screens and a simulated network, including loading and failure. • Remix the example with code pieces you have learned. • Follow a teaching simulation…