1 Measure the surface
📷Take a photo of the wall / roof to measure
Tap a known length (a door ≈ 6.7 ft, plywood = 8 ft) to set scale, then tap the corners of the area.
2 Tell us what's going on (relaxed, any language)
Talk naturally: what it is, what's wrong, what you did. AI writes the report and translates.