MacRumors:

Although more prominent features like Night Shift and a few new Quick Actions are getting the spotlight with the launch of iOS 9.3, one new lesser-known update is definitely worth checking out. In iOS 9.3, Apple has improved the functionality of its first-party Notes app with the ability to add password or Touch ID security for individual notes.

The feature allows users to prevent access to sensitive information on a case-by-case basis (some notes, like a shopping list, might not be as high risk), just in case someone gets past the lock screen security of the iPhone itself. With some people even using Notes to store passwords for various sites and services, Apple’s security-enhanced update is well worth checking out.

Ever since Notes was upgraded to sync via iCloud, I’ve started using it all the time. This move to password protect individual notes is that “one more thing” to make Notes a home run for me.