I NEED THIS FEATURE ! As a UIUX Designer , I agree that this should be implemented in Evernote. There are a lot of types of users who are using this app with specific purpose. Important to make this feature to those user who wants to lock sensitive notes. In mobile, the tap area is wider to make it "Accidentally" press the content to edit. For user who did not notice this "accidental" behavior , they might change / edit / or even remove and accidentally update the content. For PRO users , they can revert back the history. But not for Normal User , which will affects emotions and frustration , finally quit and uninstall the app. This feature is truly needed for EVERY USERS. For better solutions : Make an option for user to enable this READ-ONLY/LOCK NOTE in each note setting or notebook setting. This should be set manually by user themselves.