Here is how to set up your Anki cards on the iPhone Anki mobile app.
1) Purchase the Anki mobile app from the App Store.
2) Create an online account at http://ankiweb.net.
3) From the desktop application (download for free here), sync your cards with your new online account. This will upload any cards from your desktop application to the online account.
4) From the Anki mobile app, click on “synchronize” to download the cards from your online account.
That’s it! Now you can study your cards anywhere, at anytime, even without an Internet connection. Just remember to sync your cards before and after you study, to avoid doing the same reviews twice in two separate platforms.