Thanks for the review! Your Wave only needs to be connected to the app while you’re interacting with the app itself (to browse or customize sessions or view your usage, for example). It does not need to stay connected in the background while a session is running or when you use the buttons on your Wave to adjust the temperature or start/stop sessions, So if you use the app to select an 8-hour All Night session before bed, the app only needs to be connected to tell your Wave to start the session. It doesn’t need to stay connected once the session is in progress, and that’s why you’ll see a brief “Connecting to your Wave” screen if you open up the app again in the morning, since the Bluetooth connection hasn’t been live all night long. If you have two go-to sessions you’re always reaching for, we highly recommend using the Preset function in the app to assign them to the buttons your Wave. That way you can easily activate either of them by pressing a button, which is especially handy for times when you don’t want to pull your phone out or use the app at all. If you’re still having issues with connectivity or have other questions, please send us a message at embrlabs.com/contact!