Just opened it, interesting idea but there was not much to go on after I got the feedback for my description. On it's own I think it's not enough to hook somebody in, but could be useful as part of a bigger learning tool. And it clearly supports way more languages than Spanish so you were selling yourself short with these titles I think.
thanks for checking it out! I have been considering various flows to keep people more engaged (there are currently challenges, smart flash cards, and achievements) but at the moment the app promotes "active" learning, and I want to be careful not to introduce anything introduces "passive" learning learning paths like you might find on other apps where you don't really need to think or fully engage. My thinking at the moment is that I'd rather a user just learn something once and never come back than return every day and learn nothing..