Both Bluetooth and Wi-Fi allow to connect coffee machine and mobile phone, so you can control it remotely. The difference is that:

- Bluetooth relies on the Bluetooth technology to connect and communicate with the coffee machine locally without the aid of the Cloud (hence you don't need to create a user De'Longhi account in order to use it)

- WiFi instead relies on the internet connection to communicate with the Cloud and the coffee machine, so you need to create a user De'Longhi account in order to login into the app and then control your WiFi machine.