Point your phone at your shadow and get personalized sunlight recommendations based on your skin type, location, and time of day.
You point your phone at the ground during your lunch break, and it draws your shadow on screen with a glowing timer: "8 minutes until optimal vitamin D - stay right here." When the timer hits zero, a gentle 'lighthouse' notification pulses: "Time to find shade, you've hit your daily target." You feel empowered knowing you've naturally optimized your health without guessing or supplements.