Even after purchase, chapters unlock step by step—just like levels in a video game. You can only move on to the next chapter once you’ve completed the previous one.
Here’s why: the explanations build logically on each other. This ensures you really understand everything and no knowledge gaps form.
What this means: if you’ve finished chapter 12, purchase the app, and then immediately try to jump to a later chapter like ‘Depreciation’ (chapter 27), that chapter won’t open yet. Only after you’ve worked through chapters 13 to 26 will chapter 27 unlock for you.
Of course, any chapters you’ve already completed remain permanently accessible—you can revisit them anytime—this way we guide you through the perfect learning path!