Final answer:
The necessity for WIFI access to use the catalyst app depends on the app's need for an internet connection to function. If online features are integral to the app, then WIFI is required. Otherwise, for fully offline apps, it's not needed.
Step-by-step explanation:
Whether you need access to a family's WIFI for the Catalyst app to work depends on whether the app requires an internet connection for its functionality. Many apps need an internet connection to access online features, download data, or sync information. If the catalyst app is designed to operate fully offline, you may not need WIFI access, but if it requires the internet to perform its tasks or access its content, then a WIFI connection will be necessary.