I remember back when there were no premium features and that was when the app was good. Premium features such as explaining even more on how to solve the problem. For example, it would show you how you would "cross multiply" as a step of the problem, and nowadays, it costs money to show you how to do it. When Photomath Premium became a thing, it kinda made me like the app a little bit less because of the old features becoming premium features and I do not have that kind of money. But it is still a very useful app to use to check if you solved a problem correctly. Of course, do not use it to cheat on your math homework.