Support — Factory Manager: MES Barcode

Last updated: 2026-09-15 · Developer: NKKTech Global (NKKTECH GLOBAL PTE. LTD., 18 Sin Ming Lane, #07-13 Midview City, Singapore 573960)

This page applies to the following app, published under the developer name NKKTech Global by NKKTECH GLOBAL PTE. LTD. ("NKKTech", "we"):

Contact us

Email support@nkktech.com. Please include your device model, operating-system version, the app version and what you were doing when the problem happened. We usually reply within 2 business days.

Frequently asked questions

I bought an in-app purchase but it is not active.

Purchases are handled by the App Store or Google Play. Connect to the Internet, sign in with the same store account you bought with, then use Restore Purchases in the app. For refunds, contact Apple or Google Play.

Reminders or notifications do not show up.

Check that the reminder is turned on in the app and that notifications are allowed for the app in your device Settings. On Android, also turn off battery optimization for the app; reminders may arrive a few minutes late.

Two devices cannot find each other on the local network.

Both devices must be on the same Wi-Fi network, and that network must not use client/AP isolation (common on guest Wi-Fi). On iPhone, allow "Local Network" for the app in Settings.

The camera or photo picker does not open.

Allow Camera and Photos access for the app in your device Settings, then reopen the app.

Where is my data stored?

On your own devices. There is no NKKTech server and no account. To keep data safe, make a backup file (Settings → Backup) and store that file somewhere else. Backup files are not encrypted, so keep them private.

The other device does not appear in LAN sync.

If it still does not appear after checking Wi-Fi and permissions, type the other device's IP address directly; the Sync screen shows each device's own address.

Can I use an external barcode/QR scanner?

Yes. USB or Bluetooth scanners in HID (keyboard) mode work on every scanning screen; you do not need to tap an input field first.

Labels do not print.

Network printer: check the IP address and port (usually 9100) under Settings → Printer. Bluetooth printer (Android only): pair it in the system settings first, then select it again in the app. Without a label printer you can still print to a regular printer through the system print dialog.

I forgot a manager PIN.

PINs are stored only as a hash, so nobody can recover them, including us. Another manager account on the same data can reset the PIN for that account.

Where is Restore for paid plans?

After reinstalling or changing device, open More → Plan and tap Restore to get your Pro or Business plan back at no extra cost.

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