What is the Robinhood Crypto app?

Could you elaborate on the Robinhood Crypto app and its significance in the cryptocurrency and finance landscape? I'm curious to understand what it offers that sets it apart from other trading platforms. Specifically, I'm interested in its user interface, trading options, fees, security measures, and any unique features that make it a popular choice among cryptocurrency enthusiasts. Additionally, I'd like to know if it's suitable for beginners or if it caters more to experienced traders. Thank you for your insights.