In the top section of the sidebar (along with Today, All, etc), I'd like to see a Private section that requires the user to enter a password or use Touch/Face ID to unlock (like the Hidden album in Photos).
There would be a menu option to make something Private. Once something is Private, it does not show up anywhere unless Private items are made visible in one of two ways:
  1. Select the Private section in the sidebar, enter your password or Touch/Face ID, and view Private items.
  2. Use the "Unlock Private Items" menu option to make them operate as if they were not Private. This restores them to all smart lists, tag searches, etc. UNTIL the user selects the "Lock Private Items" menu option or restarts Anybox.