@Mike P
Yes I know the function but it's not enough.
First of all, the feature can't encrypt notes with styles or attachments.
What I want is simple - don't show the contents before I enter the password.
So you don't need password on your Bank app or eBay app just because they are in your 'personal device'?
A lot of people want to make their notes secret, and they want to avoid to expose them by any chance.