Kind of yes and kind of no. The pronunciation trainer has a point (usually after
2-3 weeks) where you stop learning new spelling rules and start hitting simple
vocabulary/example words to help test your spelling rule knowledge a bit further.
That's usually a good point to jump into making vocabulary cards. This is the
point where we would recommend that you start implementing the creation of
simple word flashcards, so that you will be reviewing them simultaneously. This
way you will achieve your goal faster, you will understand even more, and you will
be more motivated to keep going instead of only being able to hear the language.
This is where you will start seeing real improvement in your knowledge and ability
to understand and speak the language.