New: a rotatable, zoomable 3D room view with readable listening distances, wall clearances and test positions. On LiDAR iPhones, capture room geometry, simplified furniture and optional coloured surfaces. A clear measurement view remains available at any time. Compare a new measurement with the previous one: position changes, left/right timing and both bass-response shapes. The app checks whether the measurement conditions match. Improved: first-use introduction, audio-output selection, cancellation, signal detection, saved measurements, Pro export and German/English readability.