Piano Sphere requires a Roland Account. The email address you enter on the screen displayed after launching the app is used to sign in to or create your Roland Account. A verification code will be sent to that address.
If you already have a Roland Account:
Enter the email address registered to your account, then enter the verification code to sign in.
Tap “Prefer to use a password? Sign in here” to sign in with your password instead.
If you do not have a Roland Account:
Enter the email address you want to use, then enter the verification code and follow the on-screen instructions to create your account.