I live in the UK but I'm travelling to the USA soon for a visit. I would like a nav app for my iPhone 13 ProMax to avoid paying for nav in the hire car. If I subscribe to TomTom Go what maps come with it, and at what cost? Can I download a USA map for use offline in the car (I do not want mobile data on in the USA because of cost)? Are the USA maps expensive? Is this the best option for offline nav in the usa? I've tried the TomTom website but find it difficult to find anything about this.