Thats not a big issue bro, When you sending the bitcoin from one wallet to another wallet, the transaction fast is based upon your fee which you fixed in settings. So you can change accordingly whenever you sending the bitcoins.
What settings you're talking about here ? Different wallets have different settings which can be declared during processing the transaction.OP is not using bitcoin core ,blockchain.info sets custom fees depending the size of transactions in kb.Minimum fee is around 0.0001 per transaction .Case is different in core,you either calculate the custom rates and declare it in .conf or let the network decide by itself depending on the load.