# Synchronisation in Mergin Maps Mobile App

Changes in your project can be synchronised by using Synchronise project option on the main page of the mobile app or during the survey:

Synchronisation in Mergin Maps mobile app

To be able to synchronise a project, you need to:

  • be signed in to your Mergin Maps account
  • be connected to the internet
  • have write permission to the project

More about synchronisation

Want to learn more about synchronisation in Mergin Maps? Go to Synchronisation for more details.

Are you missing some data after synchronisation? How to Recover Missing Data will show you how to deal with conflict files and how to manually download data from your mobile device.

# Manual synchronisation

You can synchronise local changes by tapping the sync button in the map window. The sync button will stop rotating once the synchronisation process is finished and the Successfully synchronised message will appear at the top of the window.

Successful synchronisation message

If you want to inspect what has changed before synchronising, tap on the More button and go to Local changes.

Project status with pending changes

Here, you will see the overview of your local changes.

Mergin maps mobile app Local changes

# Automatic synchronisation

To allow automatic synchronisation in Mergin Maps mobile app, navigate to Settings and toggle on Automatically sync changes.

Automatically synchronise changes settings in Mergin Maps mobile app

As changes will be done during the survey, such as adding new features or changing field values, the synchronisation will start automatically. The sync button will indicate that synchronisation is in progress and once it is done, the Successfully synchronised message will appear.

If changes can not be synchronised automatically, e.g. when internet connection is lost during the survey, the changes need to be synchronised manually after reconnecting to the internet.

Failed to synchronise changes error message