Best cold hardware wallet for iphone

I'm about to get an iphone and was thinking of getting a cold wallet but saw that some trezor wallets are not supported on ios, what wallets do you guys use for those who have an iphone, and what is the best. I know that ledger is supported but some said that there is some backdoor if you opt for the recovery option, was wondering if its still safe if you dont opt for it , am open to any wallet ideas as well