The most feature complete mobile nostr apps are probably Nostur (iOS) and Amethyst (Android/Graphene). Damus is good on iOS too. As for a kyc-free wallet, it depends on your location. If you’re ok with a custodial wallet and Wallet of Satoshi is available for you (outside the US), it’s a solid option. Npub.cash is another option but I’d only use it for small amounts. Otherwise you’re better off running your own node or using something like Zeus with a ZeusPay address.