Dont waste your money
This "app" is only a few pages, and has very little useful information. There is no complete list of functions. The few functions that are listed only have rudimentary explanations. A few examples ar copy pasted but the explanations are not useful at all. The screenshots of the examples are barely readable. This is a money grab app. All the information in this app can be found free of charge with a simple google search. The app is unfocused. It claims to teach VBA but has only a small section of the content devoted to VBA. It simply is not worth it.
Zacharie Liman Tinguiri about Beginning Excel VBA, v2