Google Duo is the highest quality video calling app*. It’s simple, reliable, and works on smartphones and iPad. Features: The highest quality video calling app* Experience more reliable video calls with excellent video quality whether you’re on Wi-Fi or on-the-go. Works Cross-Platform Duo works on iPhones, iPads, iMacs, and other mobile platforms so you can call and hangout with friends and family using just one app. Knock Knock See who’s calling before you pick up with a live video preview. Video Messages Want to share a quick moment between calls or friend can’t answer? No problem. Leave a video message to capture any moment. Voice Calls Make voice-only calls to your friends when you can’t chat over video. Group calling Bring together all the people who matter most, even when you're apart, with group calling. Duo now supports up to 8 people in a group video call. *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.