You will be required to enter your SSN in during signup. This is because Metal Pay is FDIC insured, unlike Venmo and Cash to my knowledge. Sign up process is easy and straightforward. App and UI is very beautiful.
I checked off 1 month usage as I was an Alpha Tester and seen what this app is capable of during alpha testing. Pennsylvania is not on the list of 34 states so I cannot verify the final product, but the Alpha was something to envy. Metal Pay Rocks!