Usually for any type of withdrawal to fiat, you're going to run into KYC. In the U.S. especially you're unable to sell crypto and withdrawal fiat unless KYC is implemented because of capital gains tax. Government gotta get their piece of the pie. There's just no sure fire way of using an app to pull out fiat from crypto without it. Those types of exchanges get shut down almost immediately. That's why so many on here advocate for the use of BTC as a currency instead of swapping back and forth to fiat. Swapping back and forth to fiat eliminates the point of BTC as a whole.