Parking apps requires registration. I arrive, park my car then

(1) via machine: insert my card into the machine, get ticket, leave

(2) via app: spend 10 minutes registering an account, email, password, phone number, wants verification via email or phone number, wants me to register my credit card and the agree to them selling all my data.

IF on the other hand, they just made it use some kind of common e-cash and no registration, no tracking, no account, I'd be 100% for it.