This app works perfectly. I purchased it here on Appsumo, and it works on the Headway app my iPhone (you just need to follow the simple instructions when registering the app). I listen almost every day on my way to work every morning. 100% happy with this purchase. I've listened to over a dozen books that I would likely never find the time to read otherwise. Are the voices and pronunciations always perfect? No, but they are more than acceptable, and frankly, better than many people we hear on television etc. Some books might not all be to your liking, but I've found many interesting and informative ones that make the value of this app far exceed the price. I'm super happy with this purchase!