What a professional 3D scanner does
A professional 3D scanner — also called a terrestrial laser scanner or TLS — captures a dense point cloud of a space by rotating a laser emitter through 360 degrees. It produces millions of measurement points per scan position, accurate to 1 to 3 mm. Multiple scan positions are registered together to cover a full building.
Professional 3D scanners are used for structural engineering surveys, industrial plant documentation, heritage recording, and any application where millimeter-level accuracy across a full building is required. They are operated by specialist surveyors or engineers, require calibration, and produce large point cloud files that need specialist software for post-processing.
Common professional scanner brands include Leica, FARO, and Trimble. Hardware costs range from €5,000 for entry-level models to €50,000 or more for high-precision instruments.
What a LiDAR scanning app does
Metaroom uses the LiDAR sensor built into iPhone Pro and iPad Pro to capture room geometry while you walk through the space. The sensor emits infrared laser pulses and measures distances continuously, building a point cloud that the app processes into a dimensioned 2D floor plan and 3D model automatically.
The output is a floor plan accurate to within 1%, typically 1 to 2 cm per wall, exportable to DXF, IFC, RDF, PDF, Excel, and 30+ other formats — ready for AutoCAD, Revit, DIALux, Relux, DDS-CAD, and BIM workflows. A 3-room apartment scans in 10 to 20 minutes. No specialist training is required.
Side-by-side comparison
| Professional 3D scanner | LiDAR scanning app (Metaroom) | |
|---|---|---|
| Accuracy | 1 to 3 mm | Within 1% (1 to 2 cm per wall) |
| Output | Point cloud — requires post-processing to produce floor plan | Automatic 2D floor plan + 3D model |
| On-site time — 3-room apartment | 30 to 90 minutes per scan position, multiple positions needed | 10 to 20 minutes continuous scan |
| Post-processing | Hours to days in specialist software (Leica Cyclone, FARO Scene, etc.) | None — floor plan generated automatically after upload |
| Hardware cost | €5,000 to €50,000+ | iPhone Pro (most professionals already own one) |
| Software cost | €1,000 to €5,000/year for point cloud processing software | From €12.49/month (Metaroom) |
| Operator requirement | Specialist training required | No specialist training — usable by any professional |
| CAD export | Requires specialist processing — point cloud to CAD conversion | Direct export to DXF, IFC, and 30+ formats |
| Best for | Structural surveys, industrial plant, heritage recording, millimeter-precision work | Renovation planning, energy audits, CAD/BIM input, as-built documentation |
When you actually need a professional 3D scanner
A professional 3D scanner is the right tool in a specific set of circumstances. If your work falls into one of these categories, a scanner is justified. If it does not, a LiDAR scanning app covers your needs at a fraction of the cost.
Sub-millimeter accuracy is required
Structural engineering calculations, machine installation tolerances, industrial plant documentation, or heritage conservation recording where deformation analysis at millimeter level is needed.
A full point cloud is the deliverable
Some clients or workflows specifically require a registered point cloud — for BIM clash detection at millimeter level, or for detailed facade analysis. A floor plan app does not produce a raw point cloud deliverable.
Large or complex structures at scale
Factories, industrial plants, large public buildings, or infrastructure where scan range, density, and registration across hundreds of scan positions are required.
When a LiDAR floor plan app is sufficient
For the majority of professional building documentation, 1 to 2 cm accuracy is sufficient and a floor plan app covers everything a professional 3D scanner would be used for — faster, at lower cost, and without specialist training.
| Use case | Accuracy needed | LiDAR app sufficient? |
|---|---|---|
| Renovation planning and quotes | 1 to 3 cm | Yes |
| Energy certificate documentation | 1 to 5 cm | Yes |
| As-built documentation | 1 to 3 cm | Yes |
| CAD and BIM input | 1 to 3 cm | Yes |
| Electrical and MEP base plans | 2 to 5 cm | Yes |
| Lighting planning (DIALux, Relux) | 2 to 5 cm | Yes |
| Interior design and furniture planning | 1 to 3 cm (LiDAR) + laser for critical dimensions | Yes — with laser spot-check for fitted elements |
| Structural engineering survey | Sub-millimeter | No — use professional scanner |
| Industrial plant documentation | 1 to 5 mm | No — use professional scanner |
Cost comparison
The cost difference between a professional 3D scanner and a LiDAR scanning app is significant for most professional workflows.
A mid-range professional scanner costs €15,000 to €25,000 for hardware alone, plus €1,000 to €5,000 per year for point cloud processing software, plus training, calibration, and specialist operator time. Total annual cost for a professional scanner workflow: €20,000 to €40,000 in the first year.
Metaroom works on an iPhone Pro that most professionals already own. The subscription starts at €12.49/month — €150/year. No additional hardware, no specialist software, no training cost. For professionals whose work falls within the 1 to 2 cm accuracy range, the total cost difference over five years is €100,000 or more.
A professional 3D scanner is justified when the work specifically requires sub-millimeter accuracy or raw point cloud deliverables. For standard building documentation, it is not.
Frequently Asked Questions (FAQ)
Metaroom is a professional floor plan scanning app for architects, tradespeople, and energy consultants. It uses the LiDAR sensor in iPhone Pro or iPad Pro to produce a dimensioned 2D floor plan and 3D model, accurate to within 1%. Exports include DXF, IFC, RDF, PDF, Excel, GLB, and 30+ other formats. A 3-room apartment scans in 10 to 20 minutes. No specialist training required. Subscription from €12.49/month.
