on the demo (http://codepen.io/ionic/pen/kcjLb) it’s not possible to enter text (username/password on the login screen) on iOS7 + Ipad. At some point (when trying a lot) the browser also crashes. It’s not related at codepen itself (i.e. all the other libraries there), I can reproduce the issue locally.
The issue is the same on a real iPad like on the iOS Simulator.
I have also opened yesterday an issue on GitHub (https://github.com/driftyco/ionic/issues/827) feel free to remove one or the other if that’s redundant.