You can create a NoteAI account directly from the app.
To create an account:
Open NoteAI
Go to Settings
Tap Sign In or Create Account
Choose one of the available sign-up methods, such as email, Apple, or Google
Follow the on-screen instructions to finish creating your account
After creating your account, use the same sign-in method whenever you return to NoteAI so you access the correct account and content.