After you have gone through the initial set up process, from then on, the app should connect to your CUE1 automatically when opened, as long as the CUE1 is nearby and advertising Bluetooth. To make sure it is advertising Bluetooth, simply press the button a few times, or place the CUE1 on charge.
If you ever need to repeat the connection set-up process, for example to connect to a different CUE1 device, or if you are having trouble connecting to your CUE1, just go into “app settings” and tap connect to another CUE1.
The app will disconnect from your CUE1 automatically after a few minutes of inactivity, or if you quit the app.