today i send btc and set fee to 5 sats/byte but end up pay 145 sats/byte because Trust Wallet
The app does not charge a fee but there is a network fee that will be paid to the miners.
Once you try and send an amount, it automatically calculates the fees.
Learn more here:
yes i know it
take a look this video
And you can clearly see different fee between Trust Wallet and Blockhair