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UDI Label Preflight

Include the app name, iOS version, device model, and a short description of the issue. Do not send confidential label data unless you are authorized to share it.

Open email app ↗
suport@yunfanlabs.com

If no email app opens, copy the address and send from your preferred email service.

Common help topics

  • App installation and launch issues
  • Camera permission, scanner availability, and manual raw-data entry
  • GS1 field parsing, approved-value comparison, and issue explanations
  • Label-photo, local-history, deletion, PDF generation, and sharing questions
  • Rule interpretation questions, bug reports, or product feedback

Troubleshooting

  • If Camera permission is denied, open iOS Settings for the app or use manual raw-data entry.
  • If a symbol cannot be decoded, confirm it is a GS1 DataMatrix and paste the scanner's unmodified raw content when available.
  • If a report cannot be generated, review the inspection, confirm local storage is available, and try again.
  • If a saved inspection or report appears damaged, preserve any exported copy and contact support with the app version and the steps that led to the problem.

Response scope

Support covers app usage questions, bug reports, and product feedback. It does not certify a label, review confidential manufacturing records, grade barcode print quality, replace an ISO-compliant verifier, or provide GS1, FDA, regulatory, or legal approval.

01 / Help us help faster

  1. 01

    Name the environment

    Product, device model, OS version, and app version.

  2. 02

    List the steps

    What you did, what you expected, and what happened instead.

  3. 03

    Protect your privacy

    Remove names, locations, account details, and other sensitive content before sending.

02 / What it is for

Built around one clear, recurring problem.

An offline iPhone workflow for preserving decoded GS1 DataMatrix data, checking a supported syntax subset, comparing approved values, and creating a traceable PDF preflight report.

  • System: iPhone · iOS 17.0+
  • Preserve raw scanner or manual-input data and visible control-character positions
  • Parse and check supported AIs 01, 10, 11, 17, and 21 with deterministic rules
  • Compare approved values and create a local, shareable PDF report
  • Product privacy: No account, publisher server, analytics, advertising, tracking, or automatic upload. Inspection records and label photos stay on device unless the user explicitly exports a report.

Important:

Checks selected GS1 data syntax and user-provided approved values only. It does not grade barcode print quality, replace an ISO-compliant verifier, or provide GS1, FDA, regulatory, or legal certification.

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