The FieldApp SYNCHRONIZES all the data records with the main server.
Each mobile device therefore has its own local database. This also allows you to create and edit records while you are OFFLINE.
The records can be synced manually or automatically. To change the auto-sync settings (time interval etc…) you need to access the SETTINGS MENU.
The Maps need internet access to load map tiles but once you load a map at different zoom levels while you are online, the FieldApp will load the map tiles from your device cache in the future (even if you are offline). If you know you have no internet on site, just view the maps while you are online in the office (and zoom in an out to cache all the map tiles), then you should have access to the map when offline later on the site.