Unable to log in on iOS app – Booksy for Customers Review

Booksy is defaulted to German and I am unable to change the location to the United States. I am also unable to login to my account. When attempting to do so, it forces a new account creation. Please get this fixed ASAP. I can log in on the web version and can change the country, which is defaulted to German to the US. Is Booksy an app owned by a German company? Get it together or risk losing me.
Review by Scp Army on Booksy for Customers.