What crypto app is available in the USA?

Excuse me, I was wondering if you could help me out with something. I'm looking for a cryptocurrency app that's available in the USA. Do you have any recommendations for a reliable and user-friendly platform that I can use to buy, sell, and manage my digital assets? I'm fairly new to this space, so I'm looking for something that's easy to navigate and offers a good selection of coins. Any advice would be greatly appreciated!