How do I link Apple or Google Sign-In to my account?Updated 2 months ago

Automatic Linking

Good news: If you want to add Apple Sign-In or Google Sign-In to your existing CENTR account, the linking happens automatically when you use the social login button with the same email address.

How Automatic Linking Works

The Simple Process

1. You already have a CENTR account with email: [email protected]
2. You want to add "Sign in with Apple" or "Continue with Google" as a login option
3. On the CENTR login screen, tap "Sign in with Apple" or "Continue with Google"
4. Use your Apple ID or Google account that has THE SAME email address ([email protected])
5. CENTR automatically recognizes the matching email and links the accounts
6. Now you can use either login method for the same account

Key Requirement: Matching Email Addresses

For automatic linking to work:

• Your existing CENTR account email must match your Apple ID or Google account email
• Example: If your CENTR account is [email protected], use the Google Sign-In button with that Gmail account
• Example: If your CENTR account is [email protected], use Apple Sign-In with that Apple ID

Step-by-Step: Adding Apple Sign-In

If Your CENTR Email Matches Your Apple ID Email

1. Open the CENTR app or go to centr.com
2. On the login screen, tap or click "Sign in with Apple"
3. Authenticate with your Apple ID (Face ID, Touch ID, or password)
4. When prompted, choose "Share My Email" (use your real Apple ID email, not Hide My Email)
5. Complete authentication
6. You'll be logged into your existing CENTR account
7. From now on, you can use either "Sign in with Apple" OR your email/password to log in

Important: Use "Share My Email" Not "Hide My Email"

When linking to an existing account:

• Choose "Share My Email" option during Apple Sign-In
• This uses your real Apple ID email to match your CENTR account
• If you choose "Hide My Email," Apple creates a relay email ([email protected]) which won't match your CENTR account and may create a duplicate account instead

Step-by-Step: Adding Google Sign-In

If Your CENTR Email Matches Your Gmail/Google Account

1. Open the CENTR app or go to centr.com
2. On the login screen, tap or click "Continue with Google"
3. Select your Google account from the list
4. Make sure to select the Google account with THE SAME email as your CENTR account
5. Authorize CENTR to access your basic profile information
6. You'll be logged into your existing CENTR account
7. From now on, you can use either "Continue with Google" OR your email/password to log in

If You Have Multiple Google Accounts

• Make sure to select the Google account that matches your CENTR email
• Example: If your CENTR account is [email protected], use that Google account, not your personal Gmail
• Selecting the wrong Google account will create a new separate CENTR account

What Happens After Linking

You Have Multiple Login Options

After linking, you can log in using:

• Email and password (your original method - still works)
• "Sign in with Apple" button (if you linked Apple)
• "Continue with Google" button (if you linked Google)

All three methods log you into the SAME CENTR account with the same workout history, subscription, and data.

Your Data Remains Unchanged

• All your workout history is preserved
• Your subscription continues unchanged
• Your program progress stays the same
• Saved workouts, favorites, and preferences remain
• You just gain an additional, faster way to log in

What If Emails Don't Match?

If Your CENTR Email is Different from Your Apple ID or Google Email

If your CENTR account uses [email protected] but your Apple ID or Google account uses [email protected], automatic linking won't work.

Option 1: Change Your CENTR Email First (Recommended)

1. Update your CENTR account email to match your Apple ID or Google email
2. See our article: "How do I update my email address?"
3. Go to Profile → Account Settings and change email to match
4. Then follow the linking steps above

Option 2: Contact Support for Manual Linking

1. Email [email protected]
2. Provide your current CENTR email and your Apple ID or Google email
3. Request to link the accounts
4. Support will verify your identity and link them manually
5. Timeline: Usually completed within 24 hours

Linking Both Apple AND Google

Yes, you can link both Apple Sign-In and Google Sign-In to the same CENTR account:

1. First, link one social login (follow steps above)
2. Then, link the second social login the same way
3. You'll have three login options: email/password, Apple, and Google
4. Use whichever is most convenient at the time

Requirements for Multiple Social Logins

• Your Apple ID email should match your CENTR email, OR
• Your Google email should match your CENTR email, OR
• Contact support to manually link accounts with different emails

Common Scenarios

Scenario 1: I Have Email Login, Want to Add Apple Sign-In

1. Check that your CENTR email matches your Apple ID email
2. Tap "Sign in with Apple" on login screen
3. Choose "Share My Email" (not "Hide My Email")
4. Authenticate
5. You're now logged in and linked

Scenario 2: I Have Apple Sign-In, Want to Add Email/Password Backup

1. Go to Profile → Account Settings
2. Set a password for your account (if you don't have one)
3. Or contact support at [email protected] to add email/password login
4. You'll then be able to use either Apple Sign-In OR email/password

Scenario 3: I Accidentally Created a Duplicate Account

If you tapped "Sign in with Apple" or "Continue with Google" and it created a NEW account instead of linking to your existing one:

1. Don't panic - this can be fixed
2. Contact support at [email protected] immediately
3. Provide both email addresses (your original CENTR email and the social login email)
4. Support will merge the accounts, preserving your subscription and workout data
5. Timeline: Usually resolved within 24 hours

Unlinking Social Accounts

Can Social Logins Be Unlinked?

Once linked, social login cannot be unlinked. This is a permanent action. However, this isn't a problem because:

• Having social login linked doesn't force you to use it
• You can continue using email/password if you prefer
• Social login just remains as an available option
• You're not required to use it

If You Want to Stop Using Social Login

Even though you can't unlink it, you can simply:

• Stop using the social login button
• Continue logging in with email/password exclusively
• The social login remains available but you're not obligated to use it

Troubleshooting

Social Login Created a New Account Instead of Linking

This happens when:

• The email addresses don't match exactly
• You used "Hide My Email" with Apple Sign-In (created relay email)
• You selected the wrong Google account

Solution: Contact support at [email protected] to merge the accounts.

Can't Log In with Social Login After Linking

• Make sure you're using the correct Apple ID or Google account (same one you used to link)
• Try logging in with email/password to verify account still works
• Wait 24 hours after linking - sometimes takes time to propagate
• Clear app cache or reinstall the app
• Contact support if still not working

Linked Wrong Social Account

• If you linked the wrong Apple ID or Google account, contact support
• They can update the link to the correct social account
• Include both the incorrect and correct email addresses in your message

Security Considerations

Is Social Login Secure?

Yes, social login is very secure:

• Leverages Apple or Google's security infrastructure
• Benefits from their two-factor authentication
• No need to remember another password
• Reduces risk of password reuse across sites

Protecting Linked Accounts

• Enable two-factor authentication on your Apple ID or Google account
• Use strong passwords for your Apple ID or Google account
• Keep email/password login as a backup method
• Never share your Apple ID or Google credentials

Need Help?

If you need help linking social login or have questions, contact support:

Email: [email protected]

Include:

• Your current CENTR email address
• Which social login you want to add (Apple, Google, or both)
• Your Apple ID email or Gmail address
• Whether the emails match or are different

Response time: Usually within 24 hours

We'll help you get set up with convenient social login!