About a week ago someone introduced us to an application that my 5 yo girl just loved!
It is not made with kids in mind, so it is a bit fast moving, BUT it has a lot of awesome EK style of information.
It is called QuizUp and it is free.
It is a real time quiz with social media element, in a sense that when you chose any of the quizzes you want to do, it matches you up with someone else wanting to do that quiz and you compete. For 5 yo it is not an ideal, because she wants to go slower and discuss her answers and not be on the timer
But overall, she does not mind, because the questions are EK type of questions and even when we answer wring it shows the right answer at the end.
It has topics like geography ( all kind of aspects, we had fun playing European countries and Cities of the world), herbs and spices, fruits and vegetables, animals. You would need to do it together with a child, but I would definitely recommend it.