I can't login to the flashcard iPad appl

I downloaded LingQ flashcard into my iPad, but I can not login to it. Do I need something to do before I use it?

The flashcard app should work fine on your iPad. If it is the iLingQ app, it will only work if you are a Basic, Plus or Premium member. Please make sure the autocapitalization feature of your iPad isn’t automatically capitalizing the first letter of your username or password.