In last few months Apple has accepted bitcoin wallet and apps from app store.  There are several apps on Applestore. CoinPocketApp is both a browser based wallet as well as a phone app. CoinPocketApp's code is open source so the community can audit it and make sure that it is safe.Step 1: Generating Your Bitcoin Address.  Step 2: Backing up your Private Key.  Importing a Private Key or Paper WalletOn the Receive Bitcoin page there is a button to Import a Paper Wallet. This feature will allow you to scan an unencrypted private key, and have Pheeva send all the funds located at that address to your Pheeva address. Unlike many other wallets, Pheeva doesn't allow you to import password protected encrypted private keys. I think by this you can secure your bitcoins on iPhone.