You would have to contact them directly for more information on this subject, but their website states the following:

"The bitcoin-only app is designed to be simple and intuitive, enabling anyone in Europe to buy and sell bitcoin within minutes, with no need for registration, verification, or deposits."

At the moment you can buy up to €1000 with KYC light. So no account set up or registration, just with a bank transfer.

With MiCA, on the other hand, things will change for all those who want to continue offering these kinds of services.