Do I need to be connected via WiFi or data network when using the Plus! app? NTUC Link July 12, 2019 03:25 Updated Yes, you would need an active connection to the Internet to use the app. Related articles What will happen if I delete and reinstall the Plus! App on my phone? What is the Plus! app about? Can I use my phone like a Plus! card by tapping it in store? Why should I register my Plus! card online? How often are offers updated?