IOS won't ask for your ID but you'll have to text them a photo of it before they'll set up your account.
We have 1 Mudflap station here. Their price today is 3.64. That's $1.85 lower than the average here. Walmart is the cheapest at 4.99.
I just bought 10.5 gal, about $38. They billed my card $250, than an hour later they credited back $212. I don't know their reasoning for that.