Here are two survey apps for iPads that I found good:
•Surveypocket: This is just for taking surveys on mobile-devices. It doesn’t have a survey-software of its own, but can be synced to one of two survey tools Survey Analytics/Question Pro. After the survey is completed, you can go to your Question-pro or Survey Analytics account to see the results. Survey Analytics is a sophisticated tool, but at least for our need, we didn’t need any advanced features. A simple visual dashboard is what we really needed, but we missed that here. (Dashboard is available, but has limited functionality)
•iSurvey: Similar functionality, but I like this one more. Allows creating surveys from the web-version (https://www.isurveysoft.
The functionality of iSurvey cannot be compared to traditional survey tools like Surveymonkey, Vovici or Qualtrics (my favorite). So you may miss features like skip-logic or advanced validation. But if you have a simple survey, specifically one that needs to be run in a kiosk mode, this should work.