My 3 year old really likes this one, but I wish I could say that he's learning from it. The sound quality is insufficient to actually understand which letter has been said. If you get the free version, which has A through E, it seems sufficient, but in the full version, the deficiencies become apparent, as E and U are almost indistinguishable, along withF, V and W and several other sets. My son comes to me for help, and we're both reduced to guessing. The voice sounds like it has been computer generated rather than real samples. I suspect that is because the author has English as a second language, and is worried that his/her accent would get negative feedback. Another clue for is the harmless gaff of using the word"alphabets" where "letters" would be more appropriate.
I hope the author corrects this, because a simple update with real sampled human voices would turn this one star app into a five star app. As I said, my son already loves it, but I doubt he is learning useful phonics from it.