Google Duo is the highest quality one-to-one video calling app*. It’s simple, reliable and works on both iOS and Android phones. Features: The highest quality video calling app that just works** Stay in the moment with fast and reliable video calls with Google Duo, whether you're on Wi-Fi or on the go. A video chat app for everyone Connect with all your friends, anytime. Google Duo works across iOS and Android phones for domestic and international calls. Easy to use All it takes is a single tap to begin a video call with any of your contacts on Google Duo. Knock Knock. It's me! On Google Duo, see a live preview of who's calling before you pick up. Secure video calls All calls are fully encrypted to ensure privacy. Make voice calls, too When video isn't an option, use Google Duo to make audio-only calls. *Based on Signals Research Group technical study comparing video degradation time over 3G, LTE, and WiFi. **Data charges may apply. Check your carrier for details.