That's how it works:
Open the app and log in
iOS: Click on the Settings icon in the lower right corner
Android: Click the menu bar in the upper left corner
iOS:
Android:
Click on Status
iOS:
Android:
Under Sync from server you can see when the last synchronization took place and thus whether your objects in the app are up to date.
If you want to download the settings from the web version again (e.g. because you have created new rooms, fields or inventories), click on "Import all from server".
All settings have now been synchronized to the app.
Set the preselection again and continue with your inventory.
Note:
If there are problems here and no synchronization takes place, check whether you are connected to the Internet and use WiFi access if possible. Also check whether your password or your user name has been changed.