May I ask that which "fee" you two are referring to? The OP wants to only store coins in the wallet, and sending coin fee ain't very much TBH. Yesterday, I used it for sending some BTC, and the transaction fee was only about ~0.00004 BTC (way less than a buck).
Probably because they don't allow to customize fees and if the mempool is even a little bit full, they will make you overpay a lot (and there is nothing you can do other than using a different wallet).