You can now log in using your email, and, if you decide, unlink your Facebook account.
Here's how you can add an email to your Feeld account:
Open Feeld > go to Feeld Settings > select App Settings.
Scroll down to the bottom of the screen and select 'Create email login'.
Enter your email address.
Open the Feeld confirmation email in your email inbox and tap 'Confirm my email' (note: be sure to check your spam/junk folder).
To unlink Facebook account:
Open Feeld Settings > App Settings.
Scroll down and select 'Disconnect from Facebook' > 'Disconnect'.