Does Moneybox charge you?

I'm considering using Moneybox to start investing in cryptocurrency, but I'm wondering about the costs. Can you clarify if Moneybox charges users for their services? I want to make sure I understand all the potential fees before I sign up. Is there a flat fee, a percentage of my investments, or are there any hidden costs I should be aware of? Understanding the financial implications is important to me before I make any decisions about my investments.