There are a few wallet options on the iOS test flight. Macadamia Wallet and Mini Bits Wallet. nostr:npub1xnf02f60r9v0e5kty33a404dm79zr7z2eepyrk5gsq3m7pwvsz2sazlpr5 is also adding ecash using Cashu on their wallet, also in the testing phase on Test Flight. Take a look at these options.