Notes · 2026-10-18 · 5 min
What phone LiDAR can't do
The iPhone LiDAR prototype was fast and easy, which is exactly why I had to test where it stops being trustworthy.
Phone LiDAR is a consumer-grade depth sensor designed for AR, not for metrology. For close-range objects — a grave structure, a room, a facade detail — it can produce surprisingly usable geometry, but the accuracy envelope depends on capture discipline: how steadily you walk, how much overlap you keep, how consistent the lighting is.
The things it genuinely can't do, in my testing, are long-range and large-area capture, and anything where you need centimetre-level absolute accuracy without survey control. It also drains battery, hates direct sunlight, and is awkward one-handed in constrained spaces.
That doesn't make it useless — it makes it a tool with a clear role: fast, consistent capture of small sites, feeding 3D records and GIS notes, with accuracy claims validated against a manual or surveyed reference before anything official.
- Great for small, close-range objects and repeatable field notes.
- Not a replacement for survey-grade scanners on accuracy-critical jobs.
- Validate any measurement you plan to rely on.