You can update the phone number tied to your Retro account directly in the app, as long as you still have access to your account.
Update your phone number in the app
Open the Retro app and log in to your account.
Tap your Profile icon to go to your Profile page.
Go to Settings > Access & Recovery.
Tap Phone Number and enter your new number (include your country code, e.g. +1XXXXXXXXXX).
Follow the on-screen prompts to verify your new number via SMS.
Tip: While you're in Access & Recovery, consider adding a backup sign-in method (such as email or Sign in with Apple) to make account recovery easier in the future.
Update your email in the app
Open the Retro app and log in to your account.
Tap your Profile icon to go to your Profile page.
Go to Settings > Access & Recovery.
Tap your email in "Signed in with Google" or "Signed in with Apple"
Click Disconnect
Tap "Signed in with Google" or "Signed in with Apple" again and follow the on-screen prompts to add your new email.
