BRD wallet is one of the best Bitcoin wallets for iPhone, and considering how many BTC wallets for iOS exist today, that really says a lot about it. The wallet is compatible with Bitcoin, Bitcoin Cash, Ethereum, and almost all ERC-20 tokens, so there will definitely be no shortage of cryptocurrencies for you to trade.
Not only that, but you can also manage your own private keys, so security is also very good. Of course, that means you're in charge of security, your funds, administration, and everything in between, so if you know what you're doing, everything should be fine.
Lastly, the wallet is very easy to use, so you should have no problems with navigation and use.