Our WNYC app is designed for iPhones, but it will work just as well on an iPad -- it will just appear as a smaller window on the larger iPad screen unless you expand it.
However, by default, when you search for apps in the App Store on an iPad, the results are iPad-only apps. Since ours is an iPhone app, it may not show up right away. You'll need to change the filter on the results to show iPhone-only apps, and at that point you should find the WNYC app.
If you are still having trouble, please don't hesitate to contact us for assistance.