Why doesn’t the Mōvi remember my settings when I turn it back on?

The settings that you want the Mōvi to remember need to be written to the Mōvi before turning off the power. When you are done adjusting your settings, in the app, click SYSTEM, then WRITE SETTINGS, then YES to accept (see photos below). You will then be able to shut off the Mōvi and then turn it back on with the settings you just saved.