At Vivid Invest we have quite a simple tariff structure
We charge 0 commission per trade for the investing in EUR underlying (ETFs/shares).
We charge a 0.5% mark-up fee for the currency exchange rate for the investing in USD underlying (ETFs/shares).
Certain products like underlying ETFs might charge additional costs that are adjusted for in the price of the Fractional Share. But basically, there are no further costs. Using the Investment Pocket is totally free of charge and there are no pocket opening or asset custody fees. You can find the full pricing schedule here.