Support
PLN Mobile is the field application for PLN System, a work management platform for surveying and construction companies. It gives the crew on site their assigned tasks, task geometry, control points, photos, and team chat, and sends the result straight back to the office. This page explains how to get access, how to solve the most common problems, and how to reach us.
Getting access
PLN System is used by a whole company, not by individuals. A manager or administrator in your organization adds you to the team and sends an invitation to your work email address. You then sign in to PLN Mobile with those credentials.
Ask the manager who administers PLN for your company to open the Team page and resend it. Check the spam and junk folders first, and confirm that the invitation went to the address you are trying to sign in with.
PLN Mobile runs on iOS and Android. The office side of PLN System runs in any modern web browser, so managers can work from a desk while the crew uses the app.
The app is available in English and Lithuanian and follows the language set on your device. Support is available in both languages by email.
Signing in
Tapping Secure login opens a browser session against our identity provider at auth.plnsystem.com. Your password is entered there and never passes through the app itself. This is expected behaviour, not an error. When sign-in succeeds the browser closes and you are returned to PLN Mobile automatically.
If the browser window closes and you are back at the welcome screen, sign-in was cancelled before it finished. Tap Secure login again and let the browser finish returning to the app. If the problem repeats, close the app fully, reopen it, and try once more.
For security, mobile sessions end after a period of inactivity, and a manager can revoke access at any time. If you see a session expired message, simply sign in again. Work that was already saved on the device is not lost.
Open Settings and choose sign out. This clears the session on the device. Sign out before handing a shared device to another member of the crew.
Common questions
Location is used while you are using the app, to place you on the task map and to point the camera guide at a control point. It is requested only when you open a feature that needs it, and the app does not track your location in the background.
The camera guide needs both camera and location permission. If either was declined, open your device settings, allow them for PLN Mobile, then reopen the app. Indoors, a location fix can take longer or fail entirely, so the guide works best outside with a clear view of the sky.
Work you submit without a connection is queued on the device and sent automatically when the connection returns. Settings shows when the last sync happened and whether anything is still waiting. Keep the app installed and signed in until the queue has cleared.
Check that notifications are allowed for PLN Mobile in your device settings, and that battery saving is not restricting the app in the background. If they are allowed and messages still do not arrive, sign out, sign in again, and contact us if the problem continues.
Pull down on the list to refresh. If an item is still missing, confirm with your manager that the task is assigned to you and that it has not been reassigned or closed. Items submitted offline appear once the queue has synced.
Email [email protected]. Please include your device model, the operating system version, the app version from Settings, and what you were doing when the problem happened. That is usually enough for us to reproduce it.
Privacy and data
What PLN System collects, why, and how long it is kept is set out in full in the privacy policy. It is available without signing in.
The terms of service and the data processing agreement cover the relationship between PLN System and the organization that holds your workspace.
Open Settings in the app and choose delete account, or request it from the web page below without signing in. Your account is disabled immediately and your organization's administrators are notified.
An organization owner cannot delete their own account on its own, because that would leave the workspace without an owner. Contact us and we will guide you through deleting the organization instead.
Contact
Support for PLN Mobile and PLN System is handled by email, in English and Lithuanian. If something in the app is not working, write to us directly and describe what happened - we read every message.
Help & technical questions
[email protected]Sales & inquiries
[email protected]We typically reply within one business day. PLN System is made in Lithuania, EU.
Page last updated 20 August 2026.