With my Nexus 5 (Android) the connection with the GoSphero app works great! After the Ollie is charged using the included USB cable, only the Bluetooth function of the mobile phone needs to be enabled on the downloaded app to connect to Ollie can be produced. The Ollie travels and never jumps from a living room corner to the other :) Had so much fun with a remote-controlled vehicle inside the house! My son does not even afterwards crawled -D