Snap one photo, trace your driveway with a fingertip, and try every colour and blend on your actual home. When you find the one, your kit builds itself.
Stand back far enough to see the whole surface, hold your phone sideways, and shoot in daylight. Driveways, patios, walkways, pool decks — anything flat works.
Tap each corner of the surface. Tap your first dot (or hit Done) to close the outline.