Every fee we charge — by payment method, by amount — is listed on the fees page. There is no separate "processing fee" or "service charge" applied at checkout beyond what's shown there.
We don't charge a fee to receive money into a Payvio wallet, and we don't charge to hold a balance in any currency.
The one cost outside our control is a receiving bank occasionally applying their own incoming-transfer fee on their end, which is set by that bank, not by Payvio, and is uncommon in the corridors we serve.