How do I change the password?

This article explains how to change the password in the Somnofy App.

Enter the Main Menu by tapping the hamburger symbol in the top left corner of the main screen.
Go to Profile and tapp your name.
Scroll down towards the bottom and press the blue Change Password button to choose a new password.

Remember your new password for your next login, or request a new one if you forgot.
You can read about how to do this here.