This concept sounds good, but the app fails on so many levels.
This app will not teach you the writing system, for one thing.
Also, it rushes you through a lesson too fast to really absorb any of the vocabulary long-term. The way it shows you a picture to be associated with a Korean word with no translation causes confusion (e.g. A picture of a man hugging a large tree goes with the word 큰 - so, does this new word mean "big," "tree," "hug," "wide," or what?). And the pictures are not of Korean things anyway: white people, and - of all things - polar bears! The whole "learn like a child" thing means there is no explanation for anything whatsoever; you really have to know a bit about Korean already to get it right with such an app. Especially when you tale into account that the app is filled with typos.