The short answer
iPhone LiDAR is accurate to roughly 1 to 2 percent of the distance being measured under good conditions. On a 10-foot wall, that is about an inch or two of expected error. For most remodeling estimates, that is well within the tolerance you already build into a bid.
The sensor has an effective range of about 5 meters (16 feet) and performs best on flat, matte surfaces in even light. It is not a survey-grade instrument and it will not replace a total station for structural layout. But for capturing a kitchen, bathroom, or living room to scope a remodel, it is genuinely good enough.
The nuance is that accuracy is conditional. The same device can read within an inch on a clean drywall pass and lose several inches on a mirrored wall or across a 20-foot great room. The rest of this guide breaks down what moves that number, so you know when to trust the scan and when to reach for a tape measure. For a broader primer, see our LiDAR scanning guide for contractors.
Which devices actually have it
Not every iPhone has a LiDAR sensor, and this trips up contractors who assume the feature is universal. LiDAR is only on the Pro line: iPhone 12 Pro and every Pro model since, plus the iPad Pro from 2020 onward. Standard iPhones, the Plus models, and the SE do not include it.
If you hand a scan job to a crew member, confirm their device qualifies before they walk a site. A standard iPhone can still build a room model through photogrammetry in some apps, stitching many photos into 3D, but that path is slower and generally less accurate than a true LiDAR pass.
Newer Pro models have refined the sensor and the software around it, so a recent iPhone Pro will typically produce a cleaner scan than a 12 Pro, though the underlying accuracy spec is similar. The bigger difference between recent generations is processing speed and how well the app closes gaps in real time. For the scanning step itself, any Pro device from the last several years is capable.
What affects accuracy most
Three factors drive most of the variance in a scan: distance, surface type, and your technique.
Distance matters because accuracy degrades past the roughly 5-meter effective range. Scan a far wall from across a large room and error grows; move within 10 to 12 feet and it tightens back up. In big spaces, scan in sections rather than from one spot.
Surface type is the next lever. Flat, matte materials like drywall, painted trim, and standard flooring read well. Glass, mirrors, and dark glossy surfaces are the problem children, because the laser passes through or scatters instead of returning cleanly. Those surfaces produce gaps or phantom depth.
Technique is the factor you fully control. Slow, overlapping passes that capture floor-to-wall and wall-to-ceiling edges give the app the reference lines it needs. Fast, jerky scanning introduces drift, where small errors accumulate around the room until the start and end points no longer line up. Good technique is often the difference between a 1 percent scan and a 5 percent one. Our step-by-step scanning guide covers the method in detail.
When it is good enough to estimate from
For the bread-and-butter of remodeling work, LiDAR accuracy clears the bar comfortably. Pricing flooring by the square foot, estimating paint and drywall, scoping cabinet runs, sizing tile, and building a material takeoff all tolerate an inch or two of variance, because you order with waste factors anyway.
A scan that reads within 1 to 2 percent gives you square footage and linear footage reliable enough to quote on the spot. That is the entire value proposition: you walk a room, capture it, and produce a defensible estimate without a separate measure-up appointment. AI takeoff tools built on these scans claim up to roughly 98 percent accuracy and around 90 percent time savings versus manual counting.
Where you still want a tape measure is on the few dimensions where an inch changes the order: a custom countertop slab, an appliance cutout, a stair stringer, or anything fabricated to exact size. The smart workflow is to scan the room for the bulk takeoff and hand-verify the handful of critical dimensions. See how that feeds an instant estimate.
The limitations to plan around
LiDAR is a tool with edges, and pretending otherwise leads to bad scans. It is not survey grade. If you need millimeter precision for structural framing or legal property lines, you still need professional equipment. The iPhone sensor is built for short-range spatial capture, not surveying.
Reflective and transparent surfaces remain the main weakness. Expect gaps around windows, glass shower enclosures, mirrors, and high-gloss cabinetry, and plan to verify those manually. Very large open spaces also challenge the sensor, since you cannot stay within range of every wall at once, and long scans accumulate more drift.
Lighting affects the photo texture but not the depth data, so a dim room still measures correctly even if the model looks dark. And remember the sensor only captures what it can see. Anything blocked by furniture or behind a closed door simply will not exist in the model. Knowing these limits up front lets you design your scanning routine around them rather than discovering a hole in the data back at the office.
How it compares to the alternatives
Stacked against the tools it replaces, iPhone LiDAR is a strong middle option. A tape measure and laser distance meter are highly accurate point-to-point but slow, error-prone over a full room, and they give you a list of numbers rather than a model. Dedicated 3D capture rigs are more precise but cost thousands and are overkill for a kitchen remodel.
LiDAR on a phone you already own sits in the sweet spot: fast, free of extra hardware, accurate enough for estimating, and it outputs a usable 3D model. That is why scanning apps like Polycam and magicplan have built their products around it.
The accuracy question, though, is only half the story. Those tools give you a measured model and stop there. Alcovia uses the same LiDAR scan and adds the contractor layer the others lack: a generative photorealistic remodel render, a material takeoff, an instant estimate against your price list, and a client-ready presentation. Accurate measurement is the input; a closed deal is the output. See how it works.
Put iPhone LiDAR to work on a real job
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