Word by word Audio isn't accurate. When I want to hear any particular word of an ayat, it's really tough and doesn't work most of the time. Many times it either cuts off or reads the previous/next word or doesn't play at all. Try surah hajj ayat#1. There is a Quran app where I have seen this feature working perfectly. As an example, if I have to hear a word, I just click on that and it will play the word. And I don't have to download that particular surah or ayat for that feature.