Do apps need Internet connection to work?
Native mobile apps act as the interface between the user and the users' data and require uninterrupted connectivity. Native mobile apps with offline capability stores both the mobile app's software and its data locally on the mobile device. Offline mobile apps allow the user to run the app, regardless of connectivity.
How do I make an app offline?
Considerations for building an offline-first app start in the data layer which offers access to application data and business logic. The app may need to refresh this data from time to time from sources external to the device. In doing so, it may need to call on network resources to stay up to date.
Does an app use WiFi?
Apps, whether they are web browsers or anything else that requires internet access, use the network connections available on the device they are loaded on. A phone or tablet will either have a mobile (cellular) data connection or a WiFi connection for internet access.