Here is another telepresence robot that can be remotely controlled from your iOS/Android device. The PadBot X1 Telepresence Robot comes with WiFi and 4G connectivity to facilitate video and voice communication. It runs on 10,000mAh battery that lasts up to 8 hours.
The PadBot X1 has a wheeled motion system, 2 speakers, tilting/rising head, HD camera, sensors, and anti-fall system. Such a robot can be used to greet visitors, give them a tour, and answer questions.