Is Gemini free vs paid?

Excuse me, could you please clarify whether the Gemini platform offers its services for free or if there are any associated costs that users should be aware of? I'm particularly interested in understanding if there are any fees associated with trading cryptocurrencies on the platform, or if there are any subscription or maintenance charges that users need to pay. Additionally, I'd like to know if there are any additional costs that may arise depending on the specific features or services that a user decides to utilize on Gemini.