# QRtub documentation

## Docs

- [Creating Your First Link](https://help.qrtub.com/help/creating-your-first-link.md): Generate your first Link, download the QR code, and connect it to an Item
- [Key Concepts](https://help.qrtub.com/help/key-concepts.md): The three-entity model, Link modes, Tubs, and the print-before-link workflow
- [The Print-First Workflow](https://help.qrtub.com/help/print-first-workflow.md): Order your tags in bulk before the assets exist, apply them as gear arrives, and connect them when you are ready
- [Physical Media Management Basics](https://help.qrtub.com/help/media-basics.md): How to think about the physical material your QR codes are printed on
- [Custom Fields](https://help.qrtub.com/help/custom-fields.md): Define the fields your Items need, set allowed values and defaults, and link Items to other records
- [Pages Overview](https://help.qrtub.com/help/pages-overview.md): What a Page is, when a Link should open one, and how Destinations fit together
- [Building a Page](https://help.qrtub.com/help/building-a-page.md): Use the Page Editor to lay out sections, bind Item data, and theme the page people see when they scan
- [Using Fields in Pages](https://help.qrtub.com/help/using-fields.md): Reference Item data, Tub information, user session, and device details in URLs and conditions
- [Conditional Visibility](https://help.qrtub.com/help/conditional-visibility.md): Show or hide Destinations on Pages based on conditions
- [Device Detection & Routing](https://help.qrtub.com/help/device-detection.md): Route users to different Destinations based on their device type, operating system, or browser
- [App Links & Fallback URLs](https://help.qrtub.com/help/app-links.md): Use deep links to open mobile apps directly, with automatic fallback when the app isn't installed
- [Print Batches](https://help.qrtub.com/help/print-batches.md): Track a production run from export to installation, and see which codes are actually deployed
- [QRtub for Civil Construction](https://help.qrtub.com/industries/civil-construction.md): One QR code per machine, linking to inspections, maintenance and operator manuals
- [QRtub for Contract Cleaning](https://help.qrtub.com/industries/contract-cleaning.md): QR codes across client facilities for inspections, issue reporting and service records
- [QRtub for Arboriculture & Tree Management](https://help.qrtub.com/industries/arboriculture-tree-management.md): QR codes for tree populations: inspections, works history, and public transparency
- [QRtub for Electrical Test and Tag](https://help.qrtub.com/industries/electrical-test-and-tag.md): QR codes on tested equipment, linking to your test platform and compliance records
- [QRtub for Local Councils](https://help.qrtub.com/industries/local-government-councils.md): QR codes on council assets for inspections, contractor access and public reporting
- [SafetyCulture (iAuditor) Integration](https://help.qrtub.com/integrations/safetyculture.md): Open SafetyCulture inspections straight from a scan, pre-filled with the item's data
- [CMMS Systems Integration](https://help.qrtub.com/integrations/cmms-systems.md): Connect QR codes to your maintenance system using deep links and URL Templates