Yes, the app works in full functional offline mode and synchronizes by default every two minutes as soon as it has internet connection. This can be Wi-Fi or a mobile data network.
You can change the default synchronization time to 1 minute if you like, or every 30 minutes for example. Slowing down the sync frequencies will give you a longer battery time, although nowadays most batteries are strong enough to keep your phone working all day long.
Some actions, like completing a work order, trigger a sync process automatically.
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