Does Polkadot have an app?

I've been hearing a lot about Polkadot recently, and I'm quite intrigued by its cross-chain capabilities. However, I'm still a bit new to the cryptocurrency world and have a basic question. Could you please tell me, does Polkadot have an app that users can download and interact with? I'm interested in exploring its features and functionalities, but I'm not sure where to start. Any guidance or information you could provide would be greatly appreciated.