Notebook serves as a general purpose note-taking tool to capture your thoughts before you forget them and organize them effectively. Notebook also allows you to be in touch with your note cards at all times via syncing across all your devices. To sync your notes across all your devices a Zoho account is required. Your notes won't be synced across devices if you're not a registered Zoho user. You can create a Zoho account from the Notebook app or by visiting the account creation webpage. You will get access to all Zoho apps if you sign up.
From Notebook mobile app:
1. Click Sign Up in the app launcher screen
2. Enter your email address/mobile number and password
3. Choose your country (Based on your country your data will be stored in the appropriate data center)
4. Check the necessary agreements and click Sign Up
You can also sign up to Notebook via the various federated sign in options available. To check the options available please refer here
From webpage:
1. Go to notebook.zoho.com (If you've already signed in with an account you'll be logged in automatically)
2. You'll be redirected to Zoho's sign in page
3. Click Sign Up Now in the bottom
4. Enter your email address/mobile number and password and select your country
5. Check the necessary agreements and click Sign Up
You can also sign up via the various federated sign in options available in the webpage too.
For further details regarding sign in to your Zoho account please refer