AR-Maßband auf der Baustelle: Aufmaß-Workflow, der pro Auftrag eine Stunde spart

On a typical home renovation site survey, a kitchen remodel, a bathroom tear-out, or a few rooms of paint and floor, a tape measure and a notebook take 45-60 minutes. The same survey with an iPhone AR app and a measured floor plan takes 12-15 minutes. Here's the workflow that gets you there, and where the time savings actually come from.

What AR is good at on a job site

• Room-level dimensions. 4-6 walls in 60 seconds with LiDAR; 2-3 minutes manual.
• Furniture and fixture positions. The LiDAR scan auto-tags major items.
• Angles and squareness. Crucial for retiling, cabinet installation, anywhere "is this wall actually 90°?" matters.
• Photo-anchored notes. Capture a photo, draw an arrow to a feature, write a measurement next to it. All in one project.

What AR is NOT good for

• Sub-millimetre cabinetry work. Use a steel rule.
• Long diagonals (over 5 m) outdoors. Use a laser distance meter, AR drift makes long shots unreliable.
• Tight crawl spaces with no light. Camera AR fails; LiDAR works but the phone needs to fit in.
• As-built drawings for permit submissions. Most municipalities require licensed surveyor stamps. The app gives you a starting document, not the final.

The 15-minute survey workflow

Minute 0-2: Arrive and stage

Park, walk in, greet the homeowner. Open Ruler AR. Create a new project named after the address. This becomes the folder everything lands in.

Minute 2-7: Room scans

Walk room by room. For each room with LiDAR: tap Room Scan, walk the perimeter, finish. The app builds the floor plan automatically. For rooms without enough light (basements, closets), switch to Manual Room Builder, tap each corner walking the perimeter.

Add each room to the project folder. Most jobs are 3-5 rooms; this phase eats about 5 minutes total.

Minute 7-10: Fixed-feature measurements

Per room, capture the dimensions that won't be visible in the floor plan:

• Window head and sill heights (from floor)
• Door clear opening width and height
• Counter height and depth (kitchens)
• Ceiling height (especially if soffit/dropped ceiling)
• Existing pipe positions (under sinks, in shower)

Each measurement saves into the room's project with a thumbnail. Annotate any that need explanation ("water shutoff valve" with a photo).

Minute 10-13: Punch list

Walk through with the homeowner. As they point things out, snap a photo in the app, add a note ("damaged tile, replace, ~0.5 m²"), and attach it to the relevant room. Every photo gets geolocated to its room.

Minute 13-15: Export and wrap

Tap Share → Export PDF on the project folder. The app generates a consolidated document: cover page, per-room floor plans with dimensions, fixed-feature measurements, photos with annotations, punch list summary.

Email it to yourself before you leave. By the time you're back at your truck, the homeowner has the same PDF in their inbox.

What this enables that a clipboard didn't

• Same-day quotes. You can write the estimate from the PDF that evening, often with material quantities the app's calculator already estimated.
• Sub-contractor pre-qualification. Send the PDF to the plumber/electrician/painter before they visit. They show up having already scoped the work.
• Change-order documentation. Any mid-job dimension change gets photographed and measured in 30 seconds, with photo evidence and a timestamp.
• Insurance claims. If something goes wrong (water damage, structural surprise), you have measured pre-job documentation as evidence of original condition.

Accuracy in pro context

For most site-survey work, ±1-2 cm tolerance is acceptable. The app delivers that comfortably. For finishing-grade dimensions (cabinets, custom millwork, glass shower enclosures), use a steel rule or laser tape. The app is for getting the rough numbers fast and reliably; precision tools come in at the install phase.

Hardware recommendation

Any iPhone Pro from 12 onwards. The LiDAR scanner halves your survey time and lets you measure in pitch-dark closets. iPhone 15 Pro and newer have noticeably faster AR initialization (≈0.5s vs 1-2s on older Pro models). If you're upgrading hardware for work, the Pro line earns back the price difference in saved survey time within ~15 jobs.

Pen-and-paper holdouts

Some contractors still prefer a clipboard because they trust what they wrote down. Fair. The hybrid approach works: use the iPhone for the floor plan and area numbers (where pen-and-paper is slow and error-prone), keep the clipboard for the cabinet sketches and custom notes (where the iPhone is overkill). The PDF includes space at the bottom for handwritten addenda you scan in later.

Bottom line

A site survey that takes an hour with traditional tools takes 15 minutes with an AR app. On a 50-job year, that's 35-40 hours recovered, a full work week. The accuracy is comparable for survey purposes. The output (PDF with floor plan + dimensions + photos + notes) is more presentable to clients than a hand-drawn sketch. Worth the 15 minutes of installing and learning the app.