I highly appreciate the efforts by https://github.com/karalabe/geth-sandbox/tree/master/ios_wallet
, but the geth port is not yet stable. I did a poc, but it turned out to be quite buggy (to karalabe's credit, the disclaimer is there). It crashed numerous time as it was downloading the testnet blockchain. Also, getting the PIE warning (i.e. absolute addressing is not allowed in code signed PIE). This means it stands no chance when it comes to deployment in appstore.
Any other choices? I need a robust solution soon....