Main site nadinmacht.deDeutsch

3D scanning with a smartphone: apps, LiDAR and limits

3D scanning7 min readUpdated: 10/2026

are explained briefly when you hover over or tap them.

Before you spend money on a 3D scanner, the obvious question is: can’t a phone do it too? The short answer: for figures, decorations and large objects, often yes. For precisely fitting spare parts and small details, usually not. This article shows how smartphone scans work, which apps there are and where the line to a real scanner lies.

Two routes: photos or LiDAR

Photogrammetry works with any smartphone. You photograph the object from all sides, and the app or a server calculates a 3D model from the photos. To do this, the software looks for the same features in many images and calculates where they lie in space. How the method compares with other scanning techniques is explained under Scanning technologies compared.

LiDAR is a dedicated sensor that measures distances using the time of flight of light. Apple introduced it with the iPhone 12 Pro and has built it into the Pro models ever since. The data sheet of the current iPhone 18 Pro lists a LiDAR scanner, as does the iPad Pro. According to Apple’s data sheet, the standard iPhone 17 does not have one. LiDAR delivers a shape quickly, but it is coarse and better suited to rooms and large objects.

Many apps combine both: LiDAR for rooms and quick capture, photos for detailed objects.

Apps at a glance

A neutral overview, not a recommendation. Prices and terms according to the App Store, Google Play and manufacturer pages, as of 16 October 2026. Offers change often.

AppProviderPlatformsPriceNotes according to the provider
PolycamPolycam Inc.iOS, iPadOS, Androidfree with in-app purchasesFree plan: 10 photogrammetry captures, export only as GLTF. “Basic” plan 150 US dollars a year or 30 US dollars a month, with unlimited captures and six mesh formats. LiDAR modes only on devices with LiDAR.
KIRI EngineKIRI InnovationiOS, iPadOS, Android, Mac with Apple chipfree with in-app purchasesFree plan with photo scan and LiDAR scan, export as STL and OBJ among others with no export limit (since version 4.0). Up to 150 photos per upload. A mode for shiny and transparent objects is part of the paid plan.
RealityScan MobileEpic GamesiOS 16.0 and later, iPadOS, AndroidfreePhoto scan with AR guidance, upload to Sketchfab
ScaniverseNiantic SpatialiOS 16.6 and later with A12 chip or newer, AndroidfreeMesh export as OBJ, FBX, GLB, USDZ and LAS, plus Gaussian splats. The provider does not list STL.

For 3D printing, the export matters most. The slicer needs STL, OBJ or 3MF. A GLTF or GLB model can be converted with programs such as Blender, but that is an extra step. Which formats exist and how they differ is explained under 3D scanning: basics and File formats.

Gaussian splats look very realistic on screen but are not a closed triangle mesh. For printing you need a mesh.

How to get a good photo scan

KIRI Engine’s guide describes what matters:

  • Textured surface: Wood, stone and patterned surfaces work well. Smooth, single-coloured, shiny or transparent objects are unsuitable for photo scans.
  • Overlap: Neighbouring photos should overlap by about 70 %.
  • Three heights: Walk around the object once low, once at the middle and once from above, with at least 50 to 60 photos in total.
  • Close-ups for fine details in addition.
  • More photos usually give a better result.

You also need even light without harsh shadows. The object must not move during capture. How to prepare objects, for example with scanning spray against gloss, is explained under Preparing for scanning.

How accurate is it?

For LiDAR there is a reliable measurement: a study in Scientific Reports (Luetzenburg and others, 2021) tested the iPhone 12 Pro and iPad Pro. Result: the sensor captures small objects with an edge length of more than 10 cm with an absolute accuracy of about ±1 cm. For a coastal cliff 130 m long, the accuracy was about ±10 cm. That is impressive for terrain models, but for a spare part that has to fit onto a pin, a centimetre of deviation is useless.

Photo scans deliver much finer surfaces than LiDAR. In a comparison in Polycam, the trade magazine 3DWithUs concluded that photo mode gives better results and is the better choice for 3D printing. LiDAR only scored with speed and for large scenes.

For comparison, the manufacturer specifications of some handheld scanners from our database:

DeviceAccuracy according to the manufacturerPrice range
3DMakerpro Foxup to 0.07 mmunder €300
Creality Otter Liteup to 0.05 mm at 100 mm, laboratory conditions€300 to €600
Revopoint POP 4up to 0.03 mm in laser mode, single shot€600 to €1,200

The manufacturer values are best cases under laboratory conditions and cannot be compared directly with the study. The gap is still large.

The limits

  • Small objects: The measured LiDAR accuracy applies to objects from 10 cm. Below that, only photogrammetry remains, and it too quickly reaches its limits with screws, jewellery or miniatures.
  • Shiny, dark and transparent surfaces: Unsuitable for photo scans, according to KIRI Engine. Some apps offer special modes for them at extra cost.
  • Dimensions: Always check the size after export, ideally against a measurement you can take on the original with callipers. How to scale is explained under From scan to print.
  • Underside and undercuts: What the camera does not see is missing from the model. The app only fills such gaps with estimates.
  • Upload: With KIRI Engine you upload the photos for processing, and RealityScan Mobile is designed around uploading to Sketchfab. Photos and models then leave your device. Check the app’s privacy notices, especially when people are involved.

When a real scanner makes sense

A smartphone is often enough for:

  • Figures, busts and decorations where looks matter, not tenths of a millimetre
  • large objects and rooms, for example to plan furniture or a bracket roughly
  • first experiments to find out whether the subject interests you at all

A scanner is more worthwhile for:

  • Spare parts and fitting parts that have to match an existing part
  • small objects with fine details
  • difficult surfaces: according to the manufacturers, laser and infrared modes cope better with dark surfaces
  • frequent scanning, because handheld scanners work much faster and more repeatably

What to look for when buying is covered under Which 3D scanner is right?. You will find all devices with data sheets in the overview of 3D scanners.

3D printing from a photo

Behind the search “3D printing from photo” are three different things:

  1. A model from many photos: That is the photogrammetry described above. A single photo does not produce a model this way.
  2. A lithophane: A thin plate whose thickness depends on the brightness of the photo. Held against the light, the image appears. A single photo is enough for this. UltiMaker Cura opens image files directly and turns them into a height relief. According to Cura, the “Darker is higher” option is intended for lithophanes, because dark pixels should produce thick, opaque areas. Exactly how this works is explained under Printing lithophanes.
  3. AI generators: Some services create a 3D model from a single image; Polycam, for example, lists “AI Generated Captures” in its plans. The software invents the back and all areas that are not visible. That may be enough for decoration, but a single photo does not give real dimensions.

When scanning and printing people and other people’s figures, personality and copyright rights also apply. An overview is given under From scan to print.

In short

  • Photo scans work with any phone; at Apple, LiDAR is only in Pro models and the iPad Pro.
  • LiDAR: fast, but according to the study accurate to only about ±1 cm. For printed parts, photo mode is better.
  • Pay attention to export: STL or OBJ saves a detour.
  • Shiny, dark, transparent and small parts are difficult.
  • For fitting parts and fine details, a handheld scanner is the better choice.

Sources

As of 16 October 2026.