Looking for an Evernote alternative with password lock

I am looking for an Evernote alternative with the following requirements:

• Cloud syncing
• iPhone and iPad app
• passcode lock (with encryption) - Yes, Evernote can encode notes, but only from the desktop client. And I would prefer 1 global lock rather than encrypting all my notes one-by-one
• Evernote's rich text editor sucks and cannot be turned off, but I prefer plaintext
• An OS X native app would be great (but I don't mind if it's web only for the desktop)
• Nice to have: lists (like Wunderlist)
• Nice to have: private sharing with friends / colleagues / family members

Have you come across such an app?

I guess SimpleNote meet your requirements.

• It does sync to the cloud.
• The iOS app is universal
• You can lock the app with a passcode
• It's plaintext only
• There's no SimpleNote desktop app per se, but there's a public API and a lot of great software use it that you can find here.
  And there's also a web app
• There's no list, but there are tags.
• You can share your notes.