The videos are educational but fairly limited in knowledge. The videos have a lot of white noise in the background and the narrator does seem rather nasally at times. The app creator does seem to be trying to improve this app though so hopefully it will improve in the future. A voice actor could be hired to narrate the videos more professionally. More videos could be added; I dont mind paying more for such an improvement. Different questions could also be reviewed. If the changes are good enough, Im sure others would be persuaded to pay as well. This app needs to be a notch above Khan Academy in order to be worth $5, since Khan Academy is free and available to all.
1996e about Chem Pro: Chemistry Tutor in Your Pocket