Im a professional tutor who often works with pre-k kids. This app is easy for them to use, provides instant feedback on responses, and has four different approaches to teach letter recognition and letter sounds. My device wouldnt play the sound. I sent an email to the designers ( theres a button for that!) and heard back from the very quickly. Problem solved. Well worth the money.
Serene SoCal Gal about Letter Quiz: Alphabet Tracing, v2.3.1