Most property and field-service apps still ask users to manually enter room dimensions. Tape measure, pen, back to the app, mistype, repeat. It's tedious and it's lossy.

I've been building a property inspection app and this week I shipped a feature that replaces manual floor-area entry with a LiDAR scan. Walk around a room for 30 seconds, hit Done — the app returns floor area, wall count, door count, window dimensions, and a confidence score for each surface. No internet connection required. No server round-trips. All on-device.

Here's how I wired Apple's RoomPlan framework into a React Native / Expo app as a native module.

The Basic Idea

Apple's RoomPlan framework uses the LiDAR sensor on iPhone 12 Pro and later to build a structured 3D model of a room in real time.…