There are no fees. Period.

TurboWallet does not charge any fees, but the blockchain that the tokens live on do charge small fees that are unavoidable.

GoChain fees are typically less than a $0.01 and don't fluctuate much since there has never been gas wars.

Ethereum fees fluctuate quite a bit, and could be anywhere from a few dollars to $100. You can check current prices at https://etherscan.io/gastracker.