Depends on the wallet that can be used to exchange tokens. I already tried to exchange my tokens and it is a bit the same as the exchange site where a small fee is needed for every time you sell a token. I don't really recall if when you use wallet to exchange your current token to another token would also need a small fee but don't worry about it as it doesn't really cost much compared to transaction fees. Remember, don't use exchange sites to store your crypto for a long time.