The free transaction fees will only be for Satowallet related transactions, as will the other currencies be charged at the correct network fee?
Other transactions outside Satowallet will be charged for the minimum network fee for fast confirmation.
I understand, I hope the project achieves its objectives and that the wallet offers safe and fast in every way. Just another question, will the fee in the case of other currencies be updated in real time?
Yes fees and all currency amounts are updated in real time. this is one of the unique features of satowallet.