"If the product is free, then you are the product"
- George Washington, probably
You almost certainly have a free app that does exactly what this app does on your computer already. What you are buying here is your privacy.
Enjoy peace of mind while taking notes in an app that keeps all your data on your machine (that means no cloud databases). This keeps your data away from the predatory psycho-analytic algorithms that use your data to devise manipulative suggestions.