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Structure

structure.io

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Spec score 8.7 #4 of 29 in 3D Scanning Software

What it is

Structure builds 3D scanning hardware and software for medical, clinical, and industrial applications. Its technology supports orthotic and prosthetic fitting, wound measurement, surgical planning, and patient monitoring. The Structure Sensor 3 attaches to compatible iPads and provides millimeter depth accuracy for body measurements. Developers can use the Structure SDK for raw depth frames, mesh extraction, foot measurement, and offline licensing; the SDK also supports apps in healthcare, industrial inspection, retail fit-tech, and augmented reality. Structure Capture exports STL, OBJ, and PLY CAD files directly from compatible iPhones and iPads, and includes a Scan Quality Indicator. The SDK detects foot landmarks such as metatarsals, heel point, and arch height. Capture works with specified TrueDepth-enabled iPhones and iPads running iOS 16 or iPadOS 16 or later, and Structure Sensor ST01, ST02, and ST03. A seven-day SDK trial costs nothing. Capture costs $19.99 a month or $199 a year; the Structure Sensor 3 costs $995, paid once. Commercial SDK distribution requires a contract and a quote.

Spec sheet

What it does
Structure provides mobile 3D scanning hardware and software aimed at healthcare workflows such as orthotic fitting, wound measurement, surgical planning and monitoring.Read 15 Oct 2026 · structure.io
Integrations
The supported-app list includes Structure, Structure Calibrator, Room Capture, Skanect, 3DsizeME and multiple orthotics and prosthetics apps.Read 15 Oct 2026 · support.structure.io
Support
Structure provides customer support at [email protected] and sales support at [email protected] from its Boulder office.Read 30 Sep 2026 · structure.io
Headquarters
Boulder, Colorado, United StatesRead 28 Sep 2026 · structure.io
Biometric data protection
Uploaded scans are encrypted and stored on secure servers, are not sold or disclosed for unrelated purposes, and are retained no longer than three years.Read 30 Sep 2026 · structure.io
Biometric retention
Face and foot scans are encrypted on secure servers and retained for no longer than three years before destruction, according to the privacy policy.Read 15 Oct 2026 · structure.io
Capture compatibility
Structure Capture scans with Structure sensors or Apple TrueDepth and LiDAR cameras on supported iPhones and iPads.Read 15 Oct 2026 · structure.io
Capture exports
Capture exports 3D meshes in STL, OBJ and PLY formats.Read 15 Oct 2026 · structure.io
Capture measurements
The app includes foot landmark detection and measurements including metatarsal dimensions, heel, arch height, length and girth.Read 15 Oct 2026 · structure.io
Capture offline use
The App Store description says Structure Capture works without an internet connection.Read 15 Oct 2026 · apps.apple.com
Company size and founding
LinkedIn lists Structure as privately held, founded in 2022, headquartered in Boulder, Colorado, with 11–50 employees.Read 15 Oct 2026 · linkedin.com
Compatible devices
Structure Capture works with TrueDepth-enabled iPhone X or later on iOS 16 or later, TrueDepth-enabled iPad on iPadOS 16 or later, and Structure Sensor ST01, ST02, and ST03.Read 30 Sep 2026 · structure.io
Documentation depth
The help center contains product, getting-started, technical-support, app-submission, release-note and known-issue articles for sensors, Capture and SDKs.Read 15 Oct 2026 · support.structure.io
Geographic reach
Structure is based in Boulder, Colorado and serves customers in over 50 countries.Read 30 Sep 2026 · structure.io
Healthcare workflows
Structure technology supports custom orthotic and prosthetic fitting, wound measurement, surgical planning, and patient monitoring.Read 30 Sep 2026 · structure.io
HIPAA handling
Structure states that individually identifying health information it receives is handled in accordance with HIPAA requirements.Read 30 Sep 2026 · structure.io
Landmark detection
The SDK detects first and fifth metatarsals, heel point, arch height, coordinate frames, and the foot ground plane with each scan.Read 30 Sep 2026 · structure.io
Legal maker
The legal entity identified in the terms is XRPro, LLC, a Delaware corporation associated with Structure.Read 15 Oct 2026 · structure.io
Licence status
Structure software is proprietary: its terms retain intellectual-property ownership and restrict copying, modification, decompilation and reverse engineering.Read 15 Oct 2026 · structure.io
Limit: app reliability
Structure companion-app reviews report crashes, failed calibration, login problems and unanswered support requests.Read 15 Oct 2026 · apps.apple.com
Limit: consumer scanning
An iMore review reported finicky tracking, reflective-object problems, RAM errors and fuzzy OBJ fidelity during testing.Read 15 Oct 2026 · imore.com
Limit: known crashes
Structure's issue tracker records crashes when opening or closing the scan view and Sensor 3 initialization failures that can show a black screen or take over ten seconds.Read 15 Oct 2026 · support.structure.io
Limit: platform dependence
Ars Technica characterized the sensor as a platform that needs apps to be useful, adding hardware weight to an iPad and requiring a matching bracket.Read 15 Oct 2026 · arstechnica.com
Limit: room quality
3DMag found Room Scanner output too low in geometry and texture for attractive presentation, although quick measurements were useful.Read 15 Oct 2026 · 3dmag.com
Limit: scan technique
The Gadgeteer found that moving too quickly could prevent the model from assembling correctly and produced corrupted hair detail in an early scan.Read 15 Oct 2026 · the-gadgeteer.com
Limit: subscription backlash
App Store complaints describe the replacement scanner as worse than the former app and object to subscription pricing after buying the hardware.Read 15 Oct 2026 · apps.apple.com
Limit: sunlight and surfaces
Independent testing found bright sunlight can overwhelm infrared capture and that reflective or very bright surfaces create holes and artifacts.Read 15 Oct 2026 · 3dmag.com
News: HP agreement
A February 3, 2025 release says Structure signed a 3D-software licensing agreement allowing HP to offer Structure SDK technology to clients.Read 15 Oct 2026 · nasdaq.com
News: tariff price change
Structure announced a temporary increase of Sensor 3 pricing from $995 to $1,249 on April 28, 2025 because of tariffs, then reported a return to $995 on May 12, 2025.Read 15 Oct 2026 · support.structure.io
Praise: Capture scanning
An App Store reviewer says Capture is fast, reliable and produces consistent results for custom insoles.Read 15 Oct 2026 · apps.apple.com
Praise: hardware design
The Gadgeteer reviewer found the bracket and sensor sturdy when attached and noted more than 80 compatible apps in 2018.Read 15 Oct 2026 · the-gadgeteer.com
Praise: tracking
A 3DMag test reported smooth tracking while scanning an outdoor litter bin even when the object briefly left the frame.Read 15 Oct 2026 · 3dmag.com
Privacy and HIPAA
The policy says scan imagery is private unless requested otherwise and that provided protected health information is handled under HIPAA requirements.Read 15 Oct 2026 · structure.io
Product focus
Structure builds professional-grade 3D scanning hardware and software for medical, clinical, and industrial applications.Read 30 Sep 2026 · structure.io
Rating on Apple App Store (Structure Capture)
4.0 out of 5 from 8 ratingsRead 15 Oct 2026 · apps.apple.com
Rating on Apple App Store (Structure companion)
3.1 out of 5 from 15 ratingsRead 15 Oct 2026 · apps.apple.com
Scan quality indicator
Structure Capture includes a Scan Quality Indicator designed to ensure accurate scans and reduce rework.Read 30 Sep 2026 · structure.io
SDK capabilities
Structure SDK exposes raw depth frames, mesh extraction, scanning workflows and measurement functions to iOS developers.Read 15 Oct 2026 · structure.io
SDK extensibility
The SDK provides sample Xcode projects and a developer portal download after accepting its license.Read 15 Oct 2026 · support.structure.io
SDK licensing
Commercial SDK use requires a contract and license before distributing apps; the Structure Lite page offers a seven-day developer trial.Read 15 Oct 2026 · structure.io
SDK platforms
The cross-platform SDK package includes Windows, Linux, macOS and Android support, plus a Linux ROS driver.Read 15 Oct 2026 · support.structure.io
SDK use cases
The SDK powers apps across healthcare, industrial inspection, retail fit-tech, and augmented reality.Read 30 Sep 2026 · structure.io
Security controls
Structure uses SSL for sensitive information transmission, protects accounts with passwords or other authentication, and does not store payment card or bank account information.Read 30 Sep 2026 · structure.io
Security transport
The privacy policy says Structure uses SSL for sensitive transmission, password authentication and does not store payment-card or bank-account information.Read 15 Oct 2026 · structure.io
Sensor specification
Structure Sensor 3 is listed at 130 g, 20 cm to 5 m operating range, 940 nm infrared projection and up to three hours of battery life.Read 15 Oct 2026 · support.structure.io
Structure Sensor 3
The Structure Sensor 3 attaches to compatible iPads and provides millimeter depth accuracy for precise body measurements.Read 30 Sep 2026 · structure.io
System requirement
Structure Capture currently supports iPhone 12 Pro or later and iPad Pro 11-inch third generation or later or 12.9-inch fifth generation or later.Read 15 Oct 2026 · structure.io

Plans and prices

Structure SDK Developer License Free 7 day free trial All SDK features for experimentation and prototyping Read 30 Sep 2026 · structure.io
Structure Capture Monthly $19.99 a month monthly Unlimited scans & exports · cancel anytime through Apple Subscriptions Read 30 Sep 2026 · structure.io
Structure Capture Monthly $19.99 a month Apple App Store subscription Unlimited scans and exports · 1-week free trial Read 15 Oct 2026 · support.structure.io
Structure SDK Basic $149 a month Credit card Structure Sensor scanning · 1 app · usage reporting · iOS update compatibility · anthropometrics · landmarks · measurements Read 15 Oct 2026 · console.cloud.structure.io
Structure Capture Annual $199 a year annually Unlimited scans & exports · cancel anytime through Apple Subscriptions Read 30 Sep 2026 · structure.io
Structure Capture Yearly (App Store listing) $199 a year Apple App Store subscription In-app purchase Read 15 Oct 2026 · apps.apple.com
Structure Capture Yearly $199.99 a year Apple App Store subscription Unlimited scans and exports · 1-week free trial Read 15 Oct 2026 · support.structure.io
Structure SDK Professional $349 a month Credit card Basic features · original ST01 support · dedicated account management and onboarding Read 15 Oct 2026 · console.cloud.structure.io
Structure SDK Premium $499 a month Credit card Professional features · TrueDepth scanning with additional fees · Scan Quality Indicator · one-to-one integration support Read 15 Oct 2026 · console.cloud.structure.io
Structure Sensor 3 for iPad $995, paid once Sensor 3 · iPad bracket and cable · first year of Structure Capture Read 15 Oct 2026 · structure.io
Structure SDK Commercial License Priced on request contact for quote Commercial distribution requires contract Read 30 Sep 2026 · structure.io
Structure SDK Enterprise Priced on request More than one app · OMS · special SDK implementation · AR/VR · 510(k) support · customer troubleshooting Read 15 Oct 2026 · console.cloud.structure.io

Every Structure plan and price →

Strong points and limits

Strong points

  • Sensor 3 provides millimeter depth accuracy
  • SDK includes raw depth frames and mesh extraction
  • Capture exports STL, OBJ, and PLY files
  • SDK detects specified foot landmarks

Limits

  • Commercial SDK licensing requires a quote and contract
  • Capture compatibility specifies iOS 16 or later
  • No free plan is listed

Who it suits

Structure suits developers and organizations building scanning workflows in healthcare, industrial inspection, retail fit-tech, or augmented reality. Its hardware and Capture app also address clinical workflows involving body measurement and patient care.

Structure in depth

Read the full write-up

Overview

Structure combines 3D scanning hardware, capture software and a developer SDK for specialized measurement workflows. It suits clinical and industrial teams, as well as developers building scanning into their own apps. Its focused measurement capabilities are compelling for those users, but the paid Capture plans and dedicated sensor cost make it a poor fit for casual scanning.

Key features

Structure Sensor 3 attaches to compatible iPads and provides millimeter depth accuracy for body measurements. That supports work such as orthotic and prosthetic fitting, wound measurement, surgical planning and patient monitoring. The specialization is an advantage when measurements matter; general-purpose users may not need dedicated scanning hardware.

Structure Capture exports STL, OBJ and PLY CAD files directly from iPhone or iPad. Its Scan Quality Indicator is designed to improve scan accuracy and reduce rework, a useful safeguard in workflows where a poor capture can mean repeating work. Capture supports TrueDepth-enabled iPhone X or later on iOS 16 or later, TrueDepth-enabled iPad on iPadOS 16 or later, and Structure Sensor ST01, ST02 and ST03, so checking the device and OS requirements is essential before choosing it.

The SDK offers raw depth frames, mesh extraction, foot measurement and offline licensing. It detects foot landmarks including the first and fifth metatarsals, heel point and arch height, along with coordinate frames and the foot ground plane. Those capabilities make it a stronger fit for teams developing measurement applications than a capture-only app. Structure supports point-cloud tools, mesh reconstruction, real-time capture and API access, with exports including OBJ, STL, PLY, GLB, GLTF and 3MF.

For sensitive workflows, Structure says uploaded scans are encrypted, retained for no longer than three years and not sold or disclosed for unrelated purposes. It says individually identifying health information is handled in accordance with HIPAA requirements. It also uses SSL for sensitive information and does not store payment card or bank account information.

Pricing

The Structure SDK Developer License costs nothing, billed as a 7 day free trial, and includes all SDK features for experimentation and prototyping. It gives developers a way to evaluate and build prototypes, but it is not the commercial distribution license.

Structure Capture Monthly costs $19.99 a month, billed monthly, for unlimited scans and exports; it can be canceled anytime through Apple Subscriptions. Structure Capture Annual costs $199 a year, billed annually, for the same unlimited scans and exports. The annual term is less costly than paying the monthly rate across a full year, but it commits the buyer to annual billing.

Structure Sensor 3 for iPad costs $995, paid once as a one-time purchase and includes the first year of Structure Capture. Bulk orders require a sales quote. This is the dedicated-hardware option for users who need the sensor, not a lower-cost substitute for the recurring Capture plan after the included first year.

The Structure SDK Commercial License has custom pricing, with commercial distribution requiring a contract. That makes the free trial appropriate for experimentation, while teams planning to ship an SDK-powered product need to pursue a commercial agreement.

Platforms

Structure supports iOS, Windows, macOS, Linux and Android. Structure Capture is narrower: it works with supported iPhone and iPad devices and Structure Sensor models ST01, ST02 and ST03. Its hardware inputs include Structure Sensor ST01, ST02 and ST03, Apple TrueDepth and Apple LiDAR.

Who it's for

Structure is best suited to clinical practitioners and product teams working on body measurement, patient monitoring or surgical planning, and to developers who need depth data and foot-measurement tools in their own applications. It is less suitable for buyers who want a free scanning workflow, have no compatible capture device, or only need occasional general-purpose scans.

Pros and cons

Pros: The Sensor 3's millimeter depth accuracy and the SDK's foot-landmark detection target demanding measurement work rather than generic scanning.

Pros: Capture offers unlimited scans and exports on both paid plans, and the annual option costs $199 a year.

Pros: Multiple sensor and Apple depth inputs, plus broad export formats, support both dedicated capture and developer workflows.

Cons: Sensor 3 costs $995, paid once, and its included Capture year does not remove the ongoing subscription cost for continued Capture use.

Cons: Capture depends on specific iPhone or iPad generations and OS versions, or a compatible Structure Sensor.

Cons: The free SDK license is for experimentation and prototyping; commercial distribution requires a contract and custom pricing.

Alternatives

3D Scanning Software is the broader category to explore if Structure's specialized hardware and measurement focus is not the right match.

Choose MeshInspector if you want a free plan for viewing meshes and point clouds, basic editing and mesh repair across Linux, macOS, web and Windows. RealityScan is another free-plan option, with support for Android, iOS, Linux and Windows and eligibility that includes individuals and small businesses under $1 million USD in revenue in the past 12 months, educational institutions and students.

Polycam may suit users who want a free mobile and web option, accepting limited space, object and AI captures in exchange for GLTF exports and public link sharing. For owners of 3DMakerpro scanners, JMStudio is free and exports STL, OBJ, PLY, ASC and RSCAN. Revo Scan 6 is a free scanning and post-processing option for Revopoint scanners.

MeshLab is a free, open-source mesh processing and editing system for Linux, macOS and Windows. 3D Scanner App offers a free basic version for iOS and macOS, while Open3D is a free option with API access and support across Linux, macOS, self-hosted, web and Windows environments.

Verdict

Structure is the right choice for clinical and industrial users who need focused body-measurement workflows, or developers who need depth and foot-landmark tools in an SDK. Its strongest reason to choose it is the combination of purpose-built scanning hardware and specialized measurement capabilities; look elsewhere if you need casual, free scanning or cannot justify compatible hardware and recurring Capture costs.

Verdict

Structure combines scanning hardware, a developer SDK, and a Capture app for medical, clinical, and industrial work. Confirm device compatibility and distinguish the trial, Capture subscription, sensor purchase, and quoted commercial SDK license.

Where Specifiction places it

Alternatives to StructureAll alternatives →