You may take a look at this thread to find a few iOS wallets : https://bitcointalk.org/index.php?topic=1631151.0. Or you may take a look at the Bitcoin community website: https://bitcoin.org/en/wallets/mobile/ios/?platform=ios&step=5

There are no much-trusted wallets for iOS. But since BRD listed on the Bitcoin.org site means you might use it.