How do I delete all my data, or the data from a certain period?

Open the menu (≡) at the top left of the Notes screen → "Settings" and use "Delete All Data" or "Delete Data from Selected Period" at the bottom of the screen.

• "Delete All Data" — deletes all notes and folders
• "Delete Data from Selected Period" — deletes only the notes within the period chosen under "Data Period"

In both cases a confirmation appears twice; tapping "Delete" completes the deletion. Data deleted this way does not go to the "Trash" and cannot be restored, so please be very careful.