Kadho was founded by two gentlemen who met while earning their PhDs in biomedical engineering at the University of California, Irvine. "Why is it so difficult to learn a foreign language?" was the question that started it all. Kadho is the brainchild of their research with other scientists, child psychologists, and linguists.
Right now, they have a handful of free apps available on the iTunes App Store and Google Play. All of them are kid- and parent-friendly in that they do not collect personal information for solicitation or feature any external ads.