I use Ownr wallet app on my iPhone. This wallet is relatively young and not so popular, but it offers such features as importing an old wallet and generating many Bitcoin accounts.
It is better not to suggest it for beginners because there are a lot of closed source wallets that have turned into scam.
Open-source wallets are considered to be more trustworthy because the developers have nothing to hide, but I've been using Ownr for a year or more. It wasn't ever compromised.