NOT UPDATED FOR A12 YET

Have a game that shows ads every-time you die, but you still wanna stream Spotify or Apple Music while blocking the app from accessing Wi-Fi to show ads?

Restrict certain apps from access Wi-Fi on iOS 12 (Note this does not make them currently fallback to cellular)

This could be useful if your home Wi-Fi has a data-cap or you don't want facebook connecting to anything when you specifically haven't enabled it for a specific span of time.