About Evernote’s Passcode Lock
Premium and Business subscribers who use certain devices can now lock the Evernote app with a Passcode lock. Whenever you return to the app, you’re asked to enter your code. A Passcode lock is a great option if you share your phone or tablet with other people and want to keep them from accessing your notes.
One cool thing about this feature is that you can still create quick notes via a widget (a mini app that lives on your Home screen) even when the app is locked; you just won’t be able to view or search your notes until you enter your passcode.
You can set up Passcode Lock on your mobile device through your account settings by tapping your name in the top-left corner of the screen and then selecting Premium from the menu. On the following page tap Passcode lock to turn the feature on. You are then prompted to choose a passcode.
To change or disable the Passcode lock, return to the Passcode Lock screen, and reenter the PIN. If you mistype your Passcode three times, you’ll be asked to enter your password.
At this writing, the PIN Lock feature is exclusive to Windows Phone, Android devices, and iOS devices. Perhaps it will be extended to other platforms in the future.