The BRD wallet does not charge any fees to send a transaction. However, the cryptocurrency networks require a fee, called a "transaction fee". This fee is calculated based on the traffic on the cryptocurrency network, and is always displayed to you before you authorize a payment to be sent.
Bitcoin and Bitcoin Cash wallets that receive many small payments before trying to send one large transaction may be charged a higher transaction fee. If possible, combining the payments you receive into a smaller number of larger transactions can keep your transaction fees low.