The hoover uses Wi-Fi to connect to the local network, which is how the application on your phone connects to it. This is necessary for the initial configuration. Thereafter, the wi-fi is no longer required, all you need to do is press a button on the hoover itself to switch it on. If you don't have wi-fi, you might consider models that are less dependent on your phone's applications. The D9 Max is cool though. :)

An internet connection up to WLan is required for both setup and operation. Without a permanent Wi-Fi connection, the robot hoover is no more than a paperweight.